Plain and simple, I had a linksys, I'm assuming Wireless here, but anyways I got that error ALL THE TIME. It happens when the packet feed gets interrupted and out of sync, because you have a crappy router that sucks at everything.
I have a netgear router, and I get this problem too. I get a few minutes of CS 1.6 and then it quits and gives me that exact error. What do I do? I searched google and none of the results helped, and one of them was this thread!