Wikimedia Bugzilla is closed!

proofread.js from the ProofreadPage extension directly loads the file http://upload.wikimedia.org/wikipedia/commons/2/2a/Button_category_plus.png . Instead, it should include the file in the extension directory (some other images are already there) and load it from there.

The relevant patch:

--- a/extensions/ProofreadPage/proofread.js
+++ b/extensions/ProofreadPage/proofread.js
@@ -208,7 +208,7 @@ function proofreadpage_default_setup() {
                        image.width = 23;
                        image.height = 22;
                        image.className = "mw-toolbar-editbutton";
-                       image.src = "http://upload.wikimedia.org/wikipedia/commons/2/2a/Button_category_plus.png";
+                       image.src = wgScriptPath+'/extensions/ProofreadPage/Button_category_plus.png';
                        image.border = 0;
                        image.alt = proofreadPageMessageToggleHeaders;
                        image.title = proofreadPageMessageToggleHeaders;