Mousing over the inactive checkboxes at http://mwui.wmflabs.org/wiki/Special:RecentChanges turns my mousepointer into the hand icon.
This shouldn't happen. It doesn't happen at https://en.wikipedia.org/wiki/Special:RecentChanges or other wikis.
(Side-detail: If I click the inactive checkbox, it only becomes active at the right/bottom/left border (not top).
If I click it again, it changes back to active all over.)