A few minor things:
When sharing a news article on Google+, it seems to be unable to locate any feature images to accompany the post (works fine for Facebook, might be that Google+ uses different meta keys).
When filtering the database, it would be nice if it automatically put the cursor in the filter text box, and would also be nice if hitting enter submitted the filter (works fine for search, just not filter).
When using @ to mention another user in a forum post, it provides an autocomplete list of users which I can use the arrow keys to select, but I can only complete the selection with a mouse click; would be nice to be able to hit Tab to complete the selected entry, which is a pretty standard shortcut.