re-included URL encoded characters within _remove_invisible_characters() which were mistakenly pulled out in a previous commit, not released
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 0766911..de8504c 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -70,7 +70,7 @@
</li>
<li>Other changes
<ul>
- <li>Improved performance and accuracy of xss_clean() (no changes to security)</li>
+ <li>Improved performance and accuracy of xss_clean(), including reduction of false positives on image/file tests.</li>
</ul>
</li>
</ul>