You've Got Spam
I've been using Mozilla for web browsing since I finally got computers fast enough to run it last year.
One of the great features I've come to enjoy is the bayesian spam filter. Basically, the mail program comes to recognize what you regard to be good mail and what you regard to be junk mail. The junk appears briefly in your inbox and then disappears almost as fast, only to be seen again if you have a morbid curiosity about what sort of pills, really cheap software, and male member enhancers you're missing out on.
It manages to catch almost everything. I get a couple bits of spam a day--and these are easy to remove. Just click on the recycle icon and it leaves my inbox.
One thing irritates me about it though. I've got my mail program set to check and download regularly. This is great except that I sometimes look down, see that I've got a new mail message, check my inbox and find...
Nothing.
It was spam. It was removed. But I still have to open my mail program in order to learn something I didn't want to know about.
So, if there are any Mozilla programmers reading this... Could you please make it so that spam doesn't activate the "new mail" signal?