system update 4.0.4 with teamos 1.0 rom
I would never try to perform an official OTA update after a custom from has been installed. That is just asking for trouble. You also mentioned that you were running team eos's rom. I can tell you first hand experience, I've been a very loyal team EOS from user for my Xoom for several months and typically load every nightly they put out for my model. The reason I point this out, is because most times the developer roms xda are actually much further along than the official updates. The biggest example is the fact that ICS is not available officially from Motorola/Verizon as of yet. Plus you get so many features and functions you will likely not see in the official builds.
Others - feel free to help me explain, agree, disagree, etc....
I've tried many, and I mean many roms, mods, and themes. Hands down - Team EOS is the single most exciting, knowledgeable, helpful and down right customer oriented in the Android Development groups.
Xoom 4G - 4.0.4
Dual BootTeam EOS Nightly 79 & Team EOS Nightly Cornerstone 17