I'm normally a happy Firefox user (can't really stand IE too much nowadays, and don't particularly care much for IE7 right now), even with the fairly massive ammounts of memory it leaks. That said, there's one issue that has been driving me crazy: The Microsoft Forums.

The problem is that, say, 1 out 2 times I try to add a post there that contains a link, trying to set the link URL will cause my Firefox to crash big time; meaning I've already lost my fair share of already written answers that I had to retype (sometimes more than once, because I'm thick and do the same again which crashes firefox again <sigh/>). Very annoying. I'm at least sending all the feedback using the feedback agent and hope someone notices the issue and fixes it.