<p>Hmmm, lets see</p>
<table>
<thead>
<tr>
<th>Scintilla</th>
<th>GTK</th>
<th>Result</th>
</tr>
</thead>
<tbody>
<tr>
<td>3.6.3</td>
<td>2.24.30</td>
<td>Ok</td>
</tr>
<tr>
<td>3.6.0</td>
<td>3.16.7</td>
<td>Ok</td>
</tr>
<tr>
<td>3.7.5</td>
<td>3.22.26</td>
<td>bad</td>
</tr>
<tr>
<td>4.0.0</td>
<td>3.22.30</td>
<td>Ok</td>
</tr>
</tbody>
</table>
<p>IIRC there were a number of problems with GTK 3.22 and Scintilla, maybe you are hitting one of those  which has been fixed since 3.7.5.  Any chance you can try a later Geany (its up to 1.35 now with Scintilla 3.10.2), maybe from the <a href="https://launchpad.net/~geany-dev/+archive/ubuntu/ppa" rel="nofollow">PPA</a> if you can't build yourself.</p>

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