I know this is an issues thread but have to say - I have no issues what so ever..
I did have "exchange services stopped" issues and sony email app issues that couldn't be solved by clearing cache/data.. but I fixed those (really well, I grabbed exchange bypass patched versions and now have full Hotmail email, contacts, calendar etc sync'ing)
sound is very good for me after previously having to hack away at xmls to get decent volume output.
all in all very happy with the update
noticed slightly less free ram on 108 but at the risk of being flamed "unused ram is wasted ram" lol