I upgraded my 8900 today to OS 5 and now have issue connecting to my GMAIL ap. It says I need an internet connection, etc. I did not have this problem under 4.6. I don't have any issues with facebook, opera, or berryweather.
I did a search and didn't find any help. So far I've:
Pulled the battery
re-registered with wireless network
changed all permissions to allow
I can't resend service books because I'm on a BES