I encountered some weird bugs that might be related.
Some might be just me though:
1. Sometimes if I join in Multiplayer all player chat is said double.
2. Sometimes if I load this site it tells me I don't have flash.
3. My campaign progress reset.
4. For a very short period of time all my maps except for 5 disappeared and reappeared later again.
5. There has been much more lag than usual.
6. I get often ping-kicked in matches even though nothing in my connections changes after a period of time.
7. The friend online thingy also isn't correct.
8. The attack bug was back for a short period of time after the maps disappeared.
I might have forgotten some.