Bug tracker double encoding HTML entities in comments

This has obviously only started happening the last few hours, since comments from earlier this morning appear to be fine, but the bug tracker seems to be double encoding HTML entities. Probably best illustrated with screenshots. (I'd file a bug, but that would make it hard to demonstrate the issue.) Attempting to add this comment: http://www.adamharvey.name/stuff/bug-preview.png Results in this: http://www.adamharvey.name/stuff/double-encode.png This is happening both Firefox and Chrome for me. Haven't tested anything else. Thanks, Adam