When I try to flag spam posts, where normally it should give me the green message where it says "OK, dawg, duly noted", and the post itself shows "flagged", instead it does neither of those things, and just jumps up to the top of the current comments/thread that I'm reading. When I scroll down, the post I tried to flag is still there, unchanged.
So either it's flagging stuff and not showing me that it's flagged, or it's just failing to flag stuff at all. I don't think this is an issue with my karma preventing me from flagging stuff, as I'm fairly certain that that would display differently.
Using Firefox 23.0.1, Windows 7.