it's stable now, you nasty poor! our very own maf has ran the second release candidate -- the x64 version, even! -- for months without a hitch!
this is the FUTURE. you can either play in the past with the poors and their wiis or join the MEN OF COMPUTING on the first real significant OS upgrade in the marketplace since windows 2000. (apple's clumsy freebsd gui experiment doesn't count -- does os x even have a viable browser yet?)