Last modified: 2014-08-28 17:44:21 UTC
This might be related to Bug 49524. See https://commons.wikimedia.org/wiki/File:VE_selection_box_goes_over_menus.png When you open https://en.wikipedia.org/w/index.php?oldid=620028233 in Firefox on Windows 7, the sandbox template is autoselected. If you click on a menu (e.g., to set bold text), the menu drops down but the items that overlap with the auto-selected template can't be chosen. I am unable to reproduce this in either Safari or Firefox on a Mac.
This appears to only happen if you are at the top of the page. If you scroll down at all, then it works correctly.
I couldn't reproduce this bug, and realized it was specific to Monobook. There are other minor display issues with the toolbar in Monobook as well (like its height).
Change 156723 had a related patch set uploaded by Catrope: Fix various bugs in our Monobook stylesheet https://gerrit.wikimedia.org/r/156723
Change 156723 merged by jenkins-bot: Fix various bugs in our Monobook stylesheet https://gerrit.wikimedia.org/r/156723