Steps to reproduce:
- hover over the "contributions" link so that the pop-up appears
- move the pointer quick to the left
Clicking anywhere in the window doesn't make the pop-up disappear. To make it vanish one needs to hover over "contributions" once again. First time I noticed this, I only moved the slider to the top of the page and simply moved the mouse pointer away, accidentally "touching" the contributions link. It's quite annoying.
UPD: The move doesn't have to be quick. One can move the pointer slowly away, and the pop-up stays there