Still playing online, no other alerts, no ban on vacbanned.com, so I can only imagine you are correct, glitch!
I witnessed some pretty obvious aimbot/wallhacks at the double xp weekend. This guy was blatantly cheating, admitting it, though it was great fun???
Anyway, I am going to mark this as the correct answer!
Just noticed this:
in the additional fixes section at:
just in case there are still people worried about getting a vac ban for no apparent reason after seeing the message in game!
I read the Patch notes and as I concluded a Glitch, but what kinda a moron programmer uses a NULL field as a positive?!
I'm glad IW finally fixed this as I'm sure it made a lot of people absolutely sick not to mention causing near heart attacks.