I have wifi connection issues since I flashed the stock JB. I wasn't before when I was running JB ROMS. I had no problems with jelly belly 8.2 but was a little "skippy"
In AL, and I bought a xoom yesterday from staples with the coupon, took it home and updated it twice, 3.1 & 3.2.
The updates were showing, but wouldn't download. Had a instant download failed. Did factory resets, and then they would download.
this link is a master file. it will give you a stock recovery & a stock rom, just put it on the root of your sd card & install as usual for your current recovery
http://dl.dropbox.com/u/4033527/update.zip
here is the original thread about it
Unroot/Back to Stock (2.2) Without .sbf or RSD Lite...
your welcome,least i can do for a fellow AU fan. you live in AL?
find z4root. if you cant find it, i have it & i'll send it to you if you pm me your email
if it wont work, you'll have to use a sbf file & rsd lite to re-root