Every once in awhile my computer will slow to a very annoying level. When this happens I take a look at my task manager and sure enough either Firefox or Thunderbird is using like 99% of computer power and in excess of 100 megs of memory. If I kill the process then my computer runs just fine again.

I looked through the mozilla forum and bugzilla and this is referenced, but I'm wondering how widespread the problem is. Do you guys have any trouble or am I just an unlucky one with this bug?