diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6255e4ec..aef0a83b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+v0.6.69
+* Web UI bug fixes
+
 v0.6.68
 * [scalebar] giving a pair of distances creates a dual-unit scale bar (style b only).
 * [web] minor bug fixes and improvements.
diff --git a/package-lock.json b/package-lock.json
index b2992e85..ee568ffe 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -26,7 +26,7 @@
         "idb-keyval": "^6.2.0",
         "kdbush": "^3.0.0",
         "mproj": "0.0.37",
-        "msgpackr": "^1.8.5",
+        "msgpackr": "^1.10.1",
         "opn": "^5.3.0",
         "rw": "~1.3.3",
         "sync-request": "5.0.0",
@@ -420,20 +420,21 @@
       "license": "MIT"
     },
     "node_modules/asn1.js": {
-      "version": "5.4.1",
+      "version": "4.10.1",
+      "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-4.10.1.tgz",
+      "integrity": "sha512-p32cOF5q0Zqs9uBiONKYLm6BClCoBCM5O9JfeUSlnQLBTxYdTK+pW+nXflm8UkKd2UYlEbYz5qEi0JuZR9ckSw==",
       "dev": true,
-      "license": "MIT",
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         "bn.js": "^4.0.0",
         "inherits": "^2.0.1",
-        "minimalistic-assert": "^1.0.0",
-        "safer-buffer": "^2.1.0"
+        "minimalistic-assert": "^1.0.0"
       }
     },
     "node_modules/asn1.js/node_modules/bn.js": {
       "version": "4.12.0",
-      "dev": true,
-      "license": "MIT"
+      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
+      "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==",
+      "dev": true
     },
     "node_modules/assert": {
       "version": "1.5.0",
@@ -505,9 +506,10 @@
       }
     },
     "node_modules/bn.js": {
-      "version": "5.2.0",
-      "dev": true,
-      "license": "MIT"
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.2.1.tgz",
+      "integrity": "sha512-eXRvHzWyYPBuB4NBy0cmYQjGitUrtqwbvlzP3G6VFnNRbsZQIxQ10PbKKHt8gZ/HW/D/747aDl+QkDqg3KQLMQ==",
+      "dev": true
     },
     "node_modules/brace-expansion": {
       "version": "1.1.11",
@@ -669,32 +671,37 @@
       }
     },
     "node_modules/browserify-sign": {
-      "version": "4.2.1",
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/browserify-sign/-/browserify-sign-4.2.3.tgz",
+      "integrity": "sha512-JWCZW6SKhfhjJxO8Tyiiy+XYB7cqd2S5/+WeYHsKdNKFlCBhKbblba1A/HN/90YwtxKc8tCErjffZl++UNmGiw==",
       "dev": true,
-      "license": "ISC",
       "dependencies": {
-        "bn.js": "^5.1.1",
-        "browserify-rsa": "^4.0.1",
+        "bn.js": "^5.2.1",
+        "browserify-rsa": "^4.1.0",
         "create-hash": "^1.2.0",
         "create-hmac": "^1.1.7",
-        "elliptic": "^6.5.3",
+        "elliptic": "^6.5.5",
+        "hash-base": "~3.0",
         "inherits": "^2.0.4",
-        "parse-asn1": "^5.1.5",
-        "readable-stream": "^3.6.0",
-        "safe-buffer": "^5.2.0"
+        "parse-asn1": "^5.1.7",
+        "readable-stream": "^2.3.8",
+        "safe-buffer": "^5.2.1"
+      },
+      "engines": {
+        "node": ">= 0.12"
       }
     },
-    "node_modules/browserify-sign/node_modules/readable-stream": {
-      "version": "3.6.0",
+    "node_modules/browserify-sign/node_modules/hash-base": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/hash-base/-/hash-base-3.0.4.tgz",
+      "integrity": "sha512-EeeoJKjTyt868liAlVmcv2ZsUfGHlE3Q+BICOXcZiwN3osr5Q/zFGYmTJpoIzuaSTAwndFy+GqhEwlU4L3j4Ow==",
       "dev": true,
-      "license": "MIT",
       "dependencies": {
-        "inherits": "^2.0.3",
-        "string_decoder": "^1.1.1",
-        "util-deprecate": "^1.0.1"
+        "inherits": "^2.0.1",
+        "safe-buffer": "^5.0.1"
       },
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-        "node": ">= 6"
+        "node": ">=4"
       }
     },
     "node_modules/browserify-sign/node_modules/safe-buffer": {
@@ -764,12 +771,18 @@
       "license": "MIT"
     },
     "node_modules/call-bind": {
-      "version": "1.0.2",
-      "dev": true,
-      "license": "MIT",
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/call-bind/-/call-bind-1.0.7.tgz",
+      "integrity": "sha512-GHTSNSYICQ7scH7sZ+M2rFopRoLh8t2bLSW6BbgrtLsahOIB5iyAVJf9GjWK3cYTDaMj4XdBpM1cA6pIS0Kv2w==",
       "dependencies": {
-        "function-bind": "^1.1.1",
-        "get-intrinsic": "^1.0.2"
+        "es-define-property": "^1.0.0",
+        "es-errors": "^1.3.0",
+        "function-bind": "^1.1.2",
+        "get-intrinsic": "^1.2.4",
+        "set-function-length": "^1.2.1"
+      },
+      "engines": {
+        "node": ">= 0.4"
       },
       "funding": {
         "url": "https://github.com/sponsors/ljharb"
@@ -1116,6 +1129,22 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/define-data-property": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/define-data-property/-/define-data-property-1.1.4.tgz",
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+      "dependencies": {
+        "es-define-property": "^1.0.0",
+        "es-errors": "^1.3.0",
+        "gopd": "^1.0.1"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/define-properties": {
       "version": "1.1.3",
       "dev": true,
@@ -1244,9 +1273,10 @@
       }
     },
     "node_modules/elliptic": {
-      "version": "6.5.4",
+      "version": "6.5.5",
+      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.5.tgz",
+      "integrity": "sha512-7EjbcmUm17NQFu4Pmgmq2olYMj8nwMnpcddByChSUjArp8F5DQWcIcpriwO4ZToLNAJig0yiyjswfyGNje/ixw==",
       "dev": true,
-      "license": "MIT",
       "dependencies": {
         "bn.js": "^4.11.9",
         "brorand": "^1.1.0",
@@ -1296,6 +1326,25 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/es-define-property": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/es-define-property/-/es-define-property-1.0.0.tgz",
+      "integrity": "sha512-jxayLKShrEqqzJ0eumQbVhTYQM27CfT1T35+gCgDFoL82JLsXqTJ76zv6A0YLOgEnLUMvLzsDsGIrl8NFpT2gQ==",
+      "dependencies": {
+        "get-intrinsic": "^1.2.4"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
+    "node_modules/es-errors": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/es-errors/-/es-errors-1.3.0.tgz",
+      "integrity": "sha512-Zf5H2Kxt2xjTvbJvP2ZWLEICxA6j+hAmMzIlypy4xcBg1vKVnx89Wy0GbS+kf5cwCVFFzdCFh2XSCFNULS6csw==",
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
     "node_modules/es-to-primitive": {
       "version": "1.2.1",
       "dev": true,
@@ -1654,9 +1703,12 @@
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     },
     "node_modules/function-bind": {
-      "version": "1.1.1",
-      "dev": true,
-      "license": "MIT"
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.2.tgz",
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+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
     },
     "node_modules/functional-red-black-tree": {
       "version": "1.0.1",
@@ -1692,13 +1744,18 @@
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     },
     "node_modules/get-intrinsic": {
-      "version": "1.1.1",
-      "dev": true,
-      "license": "MIT",
+      "version": "1.2.4",
+      "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.2.4.tgz",
+      "integrity": "sha512-5uYhsJH8VJBTv7oslg4BznJYhDoRI6waYCxMmCdnTrcCrHA/fCFKoTFz2JKKE0HdDFUF7/oQuhzumXJK7paBRQ==",
       "dependencies": {
-        "function-bind": "^1.1.1",
-        "has": "^1.0.3",
-        "has-symbols": "^1.0.1"
+        "es-errors": "^1.3.0",
+        "function-bind": "^1.1.2",
+        "has-proto": "^1.0.1",
+        "has-symbols": "^1.0.3",
+        "hasown": "^2.0.0"
+      },
+      "engines": {
+        "node": ">= 0.4"
       },
       "funding": {
         "url": "https://github.com/sponsors/ljharb"
@@ -1755,6 +1812,17 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/gopd": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/gopd/-/gopd-1.0.1.tgz",
+      "integrity": "sha512-d65bNlIadxvpb/A2abVdlqKqV563juRnZ1Wtk6s1sIR8uNsXR70xqIzVqxVf1eTqDunwT2MkczEeaezCKTZhwA==",
+      "dependencies": {
+        "get-intrinsic": "^1.1.3"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/has": {
       "version": "1.0.3",
       "dev": true,
@@ -1782,10 +1850,32 @@
         "node": ">=8"
       }
     },
-    "node_modules/has-symbols": {
+    "node_modules/has-property-descriptors": {
       "version": "1.0.2",
-      "dev": true,
-      "license": "MIT",
+      "resolved": "https://registry.npmjs.org/has-property-descriptors/-/has-property-descriptors-1.0.2.tgz",
+      "integrity": "sha512-55JNKuIW+vq4Ke1BjOTjM2YctQIvCT7GFzHwmfZPGo5wnrgkid0YQtnAleFSqumZm4az3n2BS+erby5ipJdgrg==",
+      "dependencies": {
+        "es-define-property": "^1.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
+    "node_modules/has-proto": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/has-proto/-/has-proto-1.0.3.tgz",
+      "integrity": "sha512-SJ1amZAJUiZS+PhsVLf5tGydlaVB8EdFpaSO4gmiUKUOxk8qzn5AIy4ZeJUmh22znIdk/uMAUT2pl3FxzVUH+Q==",
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
+    "node_modules/has-symbols": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.0.3.tgz",
+      "integrity": "sha512-l3LCuF6MgDNwTDKkdYGEihYjt5pRPbEg46rtlmnSPlUbgmB8LOIrKJbYYFBSbnPaJexMKtiPO8hmeRjRz2Td+A==",
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         "node": ">= 0.4"
       },
@@ -1847,6 +1937,17 @@
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       }
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+    "node_modules/hasown": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/hasown/-/hasown-2.0.1.tgz",
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+      "dependencies": {
+        "function-bind": "^1.1.2"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
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       "version": "1.2.0",
       "dev": true,
@@ -2604,11 +2705,11 @@
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+      "version": "1.10.1",
+      "resolved": "https://registry.npmjs.org/msgpackr/-/msgpackr-1.10.1.tgz",
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       "optionalDependencies": {
-        "msgpackr-extract": "^3.0.1"
+        "msgpackr-extract": "^3.0.2"
       }
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     "node_modules/msgpackr-extract": {
@@ -2676,9 +2777,9 @@
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     },
     "node_modules/object-inspect": {
-      "version": "1.10.3",
-      "dev": true,
-      "license": "MIT",
+      "version": "1.13.1",
+      "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.13.1.tgz",
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       "funding": {
         "url": "https://github.com/sponsors/ljharb"
       }
@@ -2800,17 +2901,55 @@
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     "node_modules/parse-asn1": {
-      "version": "5.1.6",
+      "version": "5.1.7",
+      "resolved": "https://registry.npmjs.org/parse-asn1/-/parse-asn1-5.1.7.tgz",
+      "integrity": "sha512-CTM5kuWR3sx9IFamcl5ErfPl6ea/N8IYwiJ+vpeB2g+1iknv7zBl5uPwbMbRVznRVbrNY6lGuDoE5b30grmbqg==",
       "dev": true,
-      "license": "ISC",
       "dependencies": {
-        "asn1.js": "^5.2.0",
-        "browserify-aes": "^1.0.0",
-        "evp_bytestokey": "^1.0.0",
-        "pbkdf2": "^3.0.3",
-        "safe-buffer": "^5.1.1"
+        "asn1.js": "^4.10.1",
+        "browserify-aes": "^1.2.0",
+        "evp_bytestokey": "^1.0.3",
+        "hash-base": "~3.0",
+        "pbkdf2": "^3.1.2",
+        "safe-buffer": "^5.2.1"
+      },
+      "engines": {
+        "node": ">= 0.10"
+      }
+    },
+    "node_modules/parse-asn1/node_modules/hash-base": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/hash-base/-/hash-base-3.0.4.tgz",
+      "integrity": "sha512-EeeoJKjTyt868liAlVmcv2ZsUfGHlE3Q+BICOXcZiwN3osr5Q/zFGYmTJpoIzuaSTAwndFy+GqhEwlU4L3j4Ow==",
+      "dev": true,
+      "dependencies": {
+        "inherits": "^2.0.1",
+        "safe-buffer": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=4"
       }
     },
+    "node_modules/parse-asn1/node_modules/safe-buffer": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
     "node_modules/parse-cache-control": {
       "version": "1.0.1"
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@@ -2934,8 +3073,12 @@
       "license": "MIT"
     },
     "node_modules/qs": {
-      "version": "6.9.3",
-      "license": "BSD-3-Clause",
+      "version": "6.12.0",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.12.0.tgz",
+      "integrity": "sha512-trVZiI6RMOkO476zLGaBIzszOdFPnCCXHPG9kn0yuS1uz6xdVxPfZdB3vUig9pxPFDM9BRAgz/YUIVQ1/vuiUg==",
+      "dependencies": {
+        "side-channel": "^1.0.6"
+      },
       "engines": {
         "node": ">=0.6"
       },
@@ -2983,8 +3126,9 @@
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     },
     "node_modules/readable-stream": {
-      "version": "2.3.7",
-      "license": "MIT",
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.8.tgz",
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         "inherits": "~2.0.3",
@@ -3111,6 +3255,22 @@
         "randombytes": "^2.1.0"
       }
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+    "node_modules/set-function-length": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/set-function-length/-/set-function-length-1.2.1.tgz",
+      "integrity": "sha512-j4t6ccc+VsKwYHso+kElc5neZpjtq9EnRICFZtWyBsLojhmeF/ZBd/elqm22WJh/BziDe/SBiOeAt0m2mfLD0g==",
+      "dependencies": {
+        "define-data-property": "^1.1.2",
+        "es-errors": "^1.3.0",
+        "function-bind": "^1.1.2",
+        "get-intrinsic": "^1.2.3",
+        "gopd": "^1.0.1",
+        "has-property-descriptors": "^1.0.1"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
     "node_modules/sha.js": {
       "version": "2.4.11",
       "dev": true,
@@ -3158,6 +3318,23 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/side-channel": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/side-channel/-/side-channel-1.0.6.tgz",
+      "integrity": "sha512-fDW/EZ6Q9RiO8eFG8Hj+7u/oW+XrPTIChwCOM2+th2A6OblDtYYIpve9m+KvI9Z4C9qSEXlaGR6bTEYHReuglA==",
+      "dependencies": {
+        "call-bind": "^1.0.7",
+        "es-errors": "^1.3.0",
+        "get-intrinsic": "^1.2.4",
+        "object-inspect": "^1.13.1"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/simple-concat": {
       "version": "1.0.1",
       "dev": true,
@@ -3613,9 +3790,10 @@
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-      "version": "1.2.3",
+      "version": "1.2.5",
+      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
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       "dev": true,
-      "license": "MIT",
       "engines": {
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@@ -3944,17 +4122,20 @@
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@@ -4205,11 +4392,15 @@
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@@ -4448,6 +4639,16 @@
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@@ -4536,7 +4737,9 @@
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@@ -4580,6 +4783,19 @@
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@@ -4813,8 +5029,9 @@
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@@ -4843,12 +5060,15 @@
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-        "has": "^1.0.3",
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@@ -4880,6 +5100,14 @@
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@@ -4895,9 +5123,23 @@
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+      "resolved": "https://registry.npmjs.org/has-proto/-/has-proto-1.0.3.tgz",
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@@ -4931,6 +5173,14 @@
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+      "resolved": "https://registry.npmjs.org/hasown/-/hasown-2.0.1.tgz",
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@@ -5409,11 +5659,11 @@
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+        "msgpackr-extract": "^3.0.2"
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@@ -5454,8 +5704,9 @@
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-      "dev": true
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@@ -5533,14 +5784,35 @@
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-      "version": "5.1.6",
+      "version": "5.1.7",
+      "resolved": "https://registry.npmjs.org/parse-asn1/-/parse-asn1-5.1.7.tgz",
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-        "evp_bytestokey": "^1.0.0",
-        "pbkdf2": "^3.0.3",
-        "safe-buffer": "^5.1.1"
+        "asn1.js": "^4.10.1",
+        "browserify-aes": "^1.2.0",
+        "evp_bytestokey": "^1.0.3",
+        "hash-base": "~3.0",
+        "pbkdf2": "^3.1.2",
+        "safe-buffer": "^5.2.1"
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+          "version": "3.0.4",
+          "resolved": "https://registry.npmjs.org/hash-base/-/hash-base-3.0.4.tgz",
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+          "dev": true,
+          "requires": {
+            "inherits": "^2.0.1",
+            "safe-buffer": "^5.0.1"
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+        "safe-buffer": {
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
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+          "dev": true
+        }
       }
     },
     "parse-cache-control": {
@@ -5627,7 +5899,12 @@
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     "qs": {
-      "version": "6.9.3"
+      "version": "6.12.0",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.12.0.tgz",
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+      "requires": {
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       "version": "0.2.0",
@@ -5660,7 +5937,9 @@
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     "readable-stream": {
-      "version": "2.3.7",
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.8.tgz",
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         "inherits": "~2.0.3",
@@ -5744,6 +6023,19 @@
         "randombytes": "^2.1.0"
       }
     },
+    "set-function-length": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/set-function-length/-/set-function-length-1.2.1.tgz",
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+        "es-errors": "^1.3.0",
+        "function-bind": "^1.1.2",
+        "get-intrinsic": "^1.2.3",
+        "gopd": "^1.0.1",
+        "has-property-descriptors": "^1.0.1"
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     "sha.js": {
       "version": "2.4.11",
       "dev": true,
@@ -5774,6 +6066,17 @@
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     },
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+      "resolved": "https://registry.npmjs.org/side-channel/-/side-channel-1.0.6.tgz",
+      "integrity": "sha512-fDW/EZ6Q9RiO8eFG8Hj+7u/oW+XrPTIChwCOM2+th2A6OblDtYYIpve9m+KvI9Z4C9qSEXlaGR6bTEYHReuglA==",
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+        "get-intrinsic": "^1.2.4",
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       "dev": true
@@ -6101,7 +6404,9 @@
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+      "version": "1.2.5",
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diff --git a/package.json b/package.json
index 78f21153..61132610 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mapshaper",
-  "version": "0.6.68",
+  "version": "0.6.69",
   "description": "A tool for editing vector datasets for mapping and GIS.",
   "keywords": [
     "shapefile",
@@ -57,7 +57,7 @@
     "idb-keyval": "^6.2.0",
     "kdbush": "^3.0.0",
     "mproj": "0.0.37",
-    "msgpackr": "^1.8.5",
+    "msgpackr": "^1.10.1",
     "opn": "^5.3.0",
     "rw": "~1.3.3",
     "sync-request": "5.0.0",