Im glad theres people like you to test out all the bugs
I havnt downloaded sp2 or firefox... I hear sp2 is having problems and only time you should go around to upgrade it is if you really must do it for some reson as for firefox I never used it before I was told there are some error here and there for it but its a good browser but I also hear its having some major errors of some kind some im staying away for a little while.
In the mean time ill just download my google tollbar and jump up and down waiting for most of the bugs out there to be fixed. Why download something now that could give you errors or problem when you dont have any now and you can wait for the time that theres less errors and it works better