When I try to upvote a comment, nothing happens when I click on the arrow. If I click on it again, the red "You may only submit a comment vote every 5 seconds." error appears, yet the comment vote is not there.
Reloading the page shows that the upvote wasn't indeed acquired.
Summary update to address all comments:
- Yes, I was happily voting comments one hour ago.
- Internet Explorer 8 on Windows 7 x64.
- Tried waiting, reloading page, restarting IE, logging out and in again.
- This only happens on Meta.
It could be a vote limit problem (I casted some today, can't remember how many exactly, though); but, was this the case, shouldn't an error message appear instead of the vote just plainly disappearing?
Thanks for troubleshooting this, followed up in another question.