<p></p>
<p>I would guess it's caused by this:</p>
<p><a href="https://github.com/geany/geany-plugins/blob/5630fabcff5e29e0b4bd25e366bf9885c6e6c886/treebrowser/src/treebrowser.c#L234">https://github.com/geany/geany-plugins/blob/5630fabcff5e29e0b4bd25e366bf9885c6e6c886/treebrowser/src/treebrowser.c#L234</a></p>
<p>There's a bit of warning about this in <a href="https://developer.gnome.org/gtk3/stable/gtk3-Themeable-Stock-Images.html#gtk-icon-size-lookup" rel="nofollow">the docs</a>.</p>
<p>A simple fix might be to not lookup the width and to just pass <code>GTK_ICON_SIZE_MENU</code> or whatever on <a href="https://github.com/geany/geany-plugins/blob/5630fabcff5e29e0b4bd25e366bf9885c6e6c886/treebrowser/src/treebrowser.c#L235">the following line</a>.</p>

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