I updated yesterday and so far haven't had any major issues. I'm on T-mobile, so I had the browser problem, but deleting the "messaging download" service book fixed that. I've avoided trying to play the preloaded ringtones that are obviously corrupt. I don't need them anyway, so it's not a big deal. I've tested all of my videos and they still work, as well as my songs. I also haven't had a problem with multitype not letting you input the second character on the key (check the "y" problem earlier in the thread).

Overall I'd recommend updating. I used javaloader (with the JL_cmdr front end) to wipe my device before I updated (make sure to backup first). I figured it was a good idea to start with a clean slate with just a major change to the software.