I have been searching a lot trying to find out more about this error - apparently it has something to do with titanium backup overwriting a service id inside the phone?
I'm not getting it in my status bar like some people, nor is it causing me problems with adding new account types. The only problem I'm having is that it pops up when I click on check for system updates.
What I'm curious about is - should I even bother doing a factory reset? From what I know from my D1, that "function" was useless anyway, as the update just gets pushed onto the phone automatically when they send to your ESN. Will a phone in this state still receive updates?