It's too bad I had time-consuming connection problems with my opponent, and forfeited to move the tourney along. Otherwise, I think this would have been a fun tournament.
But on the bright side, I did find out what a desynch error looks like:
I started out with a BB'd Doll with Gravity Pull. After the timeout, the CPU played a Nightfall and a few creatures, and then attacked, killing my Doll and damaging me a bit. Then, it played some more cards, attacked a second time, and then somehow all his creatures died one by one just after the "targeting" icon appeared on them for selecting a target, and finally they respawned to form this. All of that in one swift motion.
It was pretty interesting, to say the least.