A few things I've noticed (pardon me if they've already been noted):
- Sense has closed down and reloaded for no apparent reason a few times. When I just replied to a message, it unloaded and stayed that way.
- Messaging is stubborn- it won't always reply to a message.
- The animated wallpaper/background doesn't work. It "tried to" a little while ago and simply made everything unusable- all graphics were badly distorted. But I could see that the wallpaper was "flowing". Looks like it would be kind of neat when working correctly.