Originally posted by Dum
Sorry man, must have been a random string that screwed with the servers when it tried to update your stats. Don't let it deter you from playing Black Ops though. Same thing happened to me a few times in Battle Field: Bad Company 2.
After every 5 levels or so, exit to the main menu so it backs up your stats.
yea i remember it happen on W@W when i got in a Challenge lobby but i hope w@w is affecting black ops