MMS seems to be an issue. I thought it was the T-Mobile WiFi bug, but can't reliably send over mobile network either. One will go, then the next few won't.
WiFi problem at my office. If I leave the building and come back, it won't automatically reconnect. Authentication Error. I have to manually reconnect. No problem at home though.
Also, Amazon app doesn't work quite right. Formatting messed up.