diff --git a/CHANGES.md b/CHANGES.md
index 2db121f0..e1912f24 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -10,12 +10,14 @@
   licenses. See the new license badges on the README for a summary of
   the licenses including either bundled devDependencies or all
   `devDependencies` (we have no direct npm `dependencies` currently).
+- License: Add note about unclear provenance of some images
 - License: Relicense ext-mathjax from Apache-2.0 to MIT per
   <https://github.com/josegaert/ext-mathjax/issues/6>
 - License: Clarify in `@license` that `ext-server_moinsave.js` is
   "(MIT OR GPL-2.0-or-later)" per subsequent text
 - License: Reorder license listing in `jquery.contextMenu.js` so
   that more permissive is noticeable first
+- License: Replace CC-BY-SA-2.0 polygon image (thanks, @mowijo !)
 - BREAKING CHANGE: Remove `$.pref` in favor of new `svgEditor.pref`
   (avoiding polluting jQuery). (Might be moved to own module in
   future.)
@@ -55,6 +57,7 @@
   summary of all licenses including bundled).
 - Docs: Reprioritize `docs` in commit lists (prioritize user-facing)
 - Docs: Update Pavol's email address (@prusnak)
+- Docs: Update license badges to reflect lack of (known) CC-BY-SA-2.0 usage
 - Docs: Update Contributing, Testing (renamed to Development),
     Linting and ReleaseInstructions
 - Update: Cypress code coverage plugin
diff --git a/README.md b/README.md
index 9c040bf1..1d449624 100644
--- a/README.md
+++ b/README.md
@@ -18,9 +18,12 @@
 
 (see also [licenses for dev. deps.](https://raw.githubusercontent.com/SVG-Edit/svgedit/master/badges/licenses-badge-dev.svg?sanitize=true))
 
-(Note: The protective license `CC-BY-SA-2.0` is due to our containing at least
-one image under this stricter license; to avoid its conditions, we'd
-appreciate a replacement image. See [#377](https://github.com/SVG-Edit/svgedit/issues/377))
+(Note: The license provenance of the images in `/editor/images` may not be
+fully clear, even with the origin of some of the images listed as being from <http://tango.freedesktop.org/static/cvs/tango-art-libre/22x22/>. We would like to
+replace these images if their provenance cannot be determined or is found to
+be under a protective license. If you know of the original terms, or can help
+create SVG replacement images, please let us know at:
+[#377](https://github.com/SVG-Edit/svgedit/issues/377).)
 <!-- [![License](https://img.shields.io/npm/l/svgedit.svg)](LICENSE-MIT) -->
 
 [![issuehunt-to-marktext](https://issuehunt.io/static/embed/issuehunt-button-v1.svg)](https://issuehunt.io/r/SVG-Edit/svgedit)
diff --git a/badges/licenses-badge.svg b/badges/licenses-badge.svg
index 7d0cbfa0..2c21f8ff 100644
--- a/badges/licenses-badge.svg
+++ b/badges/licenses-badge.svg
@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="553" height="80"><defs><linearGradient id="smooth" x2="0" y2="100%"><stop offset="0" stop-color="#aaa" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><style>text{font-size:11px;font-family:Verdana,DejaVu Sans,Geneva,sans-serif}text.shadow{fill:#010101;fill-opacity:.3}text.high{fill:#fff}</style><mask id="round"><rect width="100%" height="100%" rx="3" fill="#fff"/></mask></defs><g id="bg" mask="url(#round)"><path fill="navy" d="M0 0h227v80H0z"/><path fill="green" d="M227 0h90v80h-90z"/><path fill="#cc0" d="M317 0h128v80H317z"/><path fill="pink" d="M445 0h108v80H445z"/><path fill="url(#smooth)" d="M0 0h553v80H0z"/></g><g id="fg"><text class="shadow" x="5.5" y="15">License types</text><text class="high" x="5" y="14">License types</text><text class="shadow" x="5.5" y="27">(project, deps, and bundled devDeps)</text><text class="high" x="5" y="26">(project, deps, and bundled devDeps)</text><text class="shadow" x="232.5" y="15">Permissive</text><text class="high" x="232" y="14">Permissive</text><text class="shadow" x="232.5" y="39">1. Apache-2.0</text><text class="high" x="232" y="38">1. Apache-2.0</text><text class="shadow" x="232.5" y="51">2. ISC</text><text class="high" x="232" y="50">2. ISC</text><text class="shadow" x="232.5" y="63">3. MIT</text><text class="high" x="232" y="62">3. MIT</text><text class="shadow" x="232.5" y="75">4. X11</text><text class="high" x="232" y="74">4. X11</text><text class="shadow" x="322.5" y="15">Weakly</text><text class="high" x="322" y="14">Weakly</text><text class="shadow" x="322.5" y="27">protective</text><text class="high" x="322" y="26">protective</text><text class="shadow" x="322.5" y="51">1. LGPL-3.0-or-later</text><text class="high" x="322" y="50">1. LGPL-3.0-or-later</text><text class="shadow" x="450.5" y="15">Protective</text><text class="high" x="450" y="14">Protective</text><text class="shadow" x="450.5" y="39">1. CC-BY-SA-2.0</text><text class="high" x="450" y="38">1. CC-BY-SA-2.0</text></g></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" width="445" height="80"><defs><linearGradient id="smooth" x2="0" y2="100%"><stop offset="0" stop-color="#aaa" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><style>text{font-size:11px;font-family:Verdana,DejaVu Sans,Geneva,sans-serif}text.shadow{fill:#010101;fill-opacity:.3}text.high{fill:#fff}</style><mask id="round"><rect width="100%" height="100%" rx="3" fill="#fff"/></mask></defs><g id="bg" mask="url(#round)"><path fill="navy" d="M0 0h227v80H0z"/><path fill="green" d="M227 0h90v80h-90z"/><path fill="#cc0" d="M317 0h128v80H317z"/><path fill="url(#smooth)" d="M0 0h445v80H0z"/></g><g id="fg"><text class="shadow" x="5.5" y="15">License types</text><text class="high" x="5" y="14">License types</text><text class="shadow" x="5.5" y="27">(project, deps, and bundled devDeps)</text><text class="high" x="5" y="26">(project, deps, and bundled devDeps)</text><text class="shadow" x="232.5" y="15">Permissive</text><text class="high" x="232" y="14">Permissive</text><text class="shadow" x="232.5" y="39">1. Apache-2.0</text><text class="high" x="232" y="38">1. Apache-2.0</text><text class="shadow" x="232.5" y="51">2. ISC</text><text class="high" x="232" y="50">2. ISC</text><text class="shadow" x="232.5" y="63">3. MIT</text><text class="high" x="232" y="62">3. MIT</text><text class="shadow" x="232.5" y="75">4. X11</text><text class="high" x="232" y="74">4. X11</text><text class="shadow" x="322.5" y="15">Weakly</text><text class="high" x="322" y="14">Weakly</text><text class="shadow" x="322.5" y="27">protective</text><text class="high" x="322" y="26">protective</text><text class="shadow" x="322.5" y="51">1. LGPL-3.0-or-later</text><text class="high" x="322" y="50">1. LGPL-3.0-or-later</text></g></svg>
\ No newline at end of file
diff --git a/editor/images/README.txt b/editor/images/README.txt
index 184e3e72..7c5b5739 100644
--- a/editor/images/README.txt
+++ b/editor/images/README.txt
@@ -41,8 +41,8 @@ none.png
 open.png
 paste.png
 path.png
-polygon.png                     http://tango.freedesktop.org/static/cvs/tango-art-libre/22x22/tools/draw-polygon.png
-polygon.svg                     http://tango.freedesktop.org/static/cvs/tango-art-libre/22x22/tools/draw-polygon.svg
+polygon.png                     https://github.com/SVG-Edit/svgedit/issues/377
+polygon.svg                     https://github.com/SVG-Edit/svgedit/issues/377
 rect.png
 redo.png
 rotate.png
diff --git a/editor/images/polygon.png b/editor/images/polygon.png
index 533ea1f6..609b3e55 100644
Binary files a/editor/images/polygon.png and b/editor/images/polygon.png differ
diff --git a/editor/images/polygon.svg b/editor/images/polygon.svg
index a7f955d8..e4962213 100644
--- a/editor/images/polygon.svg
+++ b/editor/images/polygon.svg
@@ -1,219 +1,76 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
 <svg
    xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://web.resource.org/cc/"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:svg="http://www.w3.org/2000/svg"
    xmlns="http://www.w3.org/2000/svg"
    xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns:sodipodi="http://inkscape.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
    xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   sodipodi:docname="draw-polygon.svg"
-   sodipodi:docbase="/home/andreas/projekt/tango/22"
-   inkscape:version="0.42"
-   id="svg8728"
-   height="22.000000px"
+   version="1.1"
    width="22.000000px"
-   inkscape:export-filename="/home/andreas/projekt/tango/22/draw-polygon.png"
-   inkscape:export-xdpi="90.000000"
-   inkscape:export-ydpi="90.000000">
+   height="22.000000px"
+   id="svg8728"
+   sodipodi:docname="polygon.svg"
+   inkscape:version="0.92.4 (5da689c313, 2019-01-14)">
+  <metadata id="license">
+    This file is released under the MIT license.
+  </metadata>
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1414"
+     inkscape:window-height="1016"
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+     showgrid="false"
+     inkscape:zoom="9.8636364"
+     inkscape:cx="2.1014226"
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+     inkscape:window-y="0"
+     inkscape:window-maximized="0"
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      id="defs3">
     <linearGradient
-       inkscape:collect="always"
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+       id="linearGradient928">
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          offset="0"
-         id="stop3943" />
+         id="stop924" />
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+         style="stop-color:#ffffff;stop-opacity:0"
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-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-        <dc:title>Draw Rectangle</dc:title>
-        <dc:date>2005-10-10</dc:date>
-        <dc:creator>
-          <cc:Agent>
-            <dc:title>Andreas Nilsson</dc:title>
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-        </dc:subject>
-        <cc:license
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-      <cc:License
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-        <cc:permits
-           rdf:resource="http://web.resource.org/cc/Reproduction" />
-        <cc:permits
-           rdf:resource="http://web.resource.org/cc/Distribution" />
-        <cc:requires
-           rdf:resource="http://web.resource.org/cc/Notice" />
-        <cc:requires
-           rdf:resource="http://web.resource.org/cc/Attribution" />
-        <cc:permits
-           rdf:resource="http://web.resource.org/cc/DerivativeWorks" />
-        <cc:requires
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-       style="fill:url(#linearGradient2405);fill-opacity:1.0000000;fill-rule:evenodd;stroke:#888a85;stroke-width:1.0000002px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1.0000000"
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-       id="path2401"
-       sodipodi:nodetypes="cccccc" />
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 </svg>
diff --git a/licenseInfo.json b/licenseInfo.json
index 7563c72a..a5050316 100644
--- a/licenseInfo.json
+++ b/licenseInfo.json
@@ -14,7 +14,6 @@
     "(MIT OR GPL-2.0)": ["editor/jquery-ui/jquery-ui-1.8.17.custom.min.js", "editor/jquerybbq/jquery.bbq.min.js", "editor/js-hotkeys/jquery.hotkeys.min.js"],
     "(MIT OR GPL-2.0-or-later)": ["editor/contextmenu/jQuery.contextMenu.js", "editor/extensions/ext-server_moinsave.js"],
     "Apache-2.0": ["editor/contextmenu.js", "editor/extensions/ext-foreignobject.js", "editor/extensions/ext-grid.js", "editor/extensions/ext-markers.js", "screencasts/svgopen2010/index.html", "editor/jgraduate/jQuery.jGraduate.js", "editor/extensions/mathjax/MathJax.min.js", "editor/extensions/mathjax/TeX-AMS-MML_SVG.js"],
-    "CC-BY-SA-2.0": ["editor/images/polygon.svg"],
     "ISC": ["editor/external/query-result/esm/index.js"],
     "LGPL-3.0-or-later": ["editor/jspdf/jspdf.plugin.svgToPdf.js"],
     "X11": ["editor/jspdf/jspdf.min.js"]
diff --git a/package.json b/package.json
index 6162c1d9..05cd3680 100644
--- a/package.json
+++ b/package.json
@@ -114,7 +114,7 @@
     "Brett Zamir",
     "Fabien Jacq"
   ],
-  "license": "(MIT AND Apache-2.0 AND CC-BY-SA-2.0 AND ISC AND LGPL-3.0-or-later AND X11)",
+  "license": "(MIT AND Apache-2.0 AND ISC AND LGPL-3.0-or-later AND X11)",
   "bugs": {
     "url": "https://github.com/SVG-Edit/svgedit/issues"
   },