using Gentoo Linux 1.4 since April 2003 still on Evoloution because Mozilla Mail keeps loosing my addressbook or locking up Mozilla (that was in mandrake) but when thunderbird comes out i will give it a go if i can copy all my old downloaded POP3 mail over to it (forum notifications mainly, i search them to find links to stuff i need that i know i've posted or replyed in the thread)

I use Mandrake Linux as my Main OS, mozilla as my web browser and i decided to use mozillamail as my mail client a few days ago (i used to use evolution)