
Mygen is reporting that the Xbox 360 system update is causing some problems with Xbox.com accounts.
The update allows you to move your Xbox Live account to a different Windows Live ID, a welcome feature for those of us who signed up with email addresses that we no longer use. However, it seems that if you actually go ahead and do that, you'll lose all of your Xbox.com forum posts, your community level, and any icons you may have earned.
If you don't frequent the Xbox.com community, you should be safe changing your ID, but otherwise you may want to wait a few days until the matter is resolved.