Last modified: 2013-11-20 00:18:55 UTC
eg. http://i.imgur.com/eWhCpLe.png (The title does not match the photo) Difficult to replicate. I think there's a "clicking too fast" element involved? Only in Chromium, afaik.
Possibly a duplicate of bug 56426 ?
This should definitely not be an issue anymore. I clear the interface after every close now. Reopen if it is.