I finally switched to Firefox about 2 weeks ago. =/
Mozilla was just too nice to me and very stable. Now I get some crashes in Firefox, but I don't know if that is because I have some horribly built plugins since theres not much of a plugin market on Linux.
I'm running Firefox on Windows, it runs much better on my Windows Machine than it does on my Linux (Debian) box.
I rarely use IE any more, and avoid IE like the plague for anything that requires a secure connection.