Did you ever think that because there are a ton of people trying to kill Santa at once... that your computer's processor/RAM crashed you out? The Alpaca box shows up on every crash, whether it's server-side or consumer-side.
I watched my CPU/RAM usage as I tried to kill Santa recently... there were so many people there that I lagged terribly even with 16gigs of RAM. And what do you know, the more lag I got, the higher my CPU percentage consumed. I used to crash out all the time in Aven channel 1 because of the amount of people setting up shop there that it lagged me out. But after I upgraded my RAM, I just lag a little instead of crashing out.
That's probably what's happening to you.