I was on .236, having strange problems with messages mostly. Having changed, it's working great (though only two days of use so far).

I don't use my flip for music, so can't comment on music player problems.

I know after an upgrade there can be lag on the phone for a while, IMO after this upgrade the lag to do anything was so bad for a few hours that the phone was almost unusable, but that's sorted itself out now.