Possible Duplicate:
Downvote pop-up is overlapped by the question, if the question is transparent
I just downvoted an answer and wasn't able to read the text in the tooltip because it was placed underneath a code block in the answer.
This happened in a Chrome like browser version 16.
The post I used in the example below is here: https://stackoverflow.com/a/2773421/444991.
pop-up
(vs.tooltip
).