Some of us gets crashes unless we manually flag the game for LAA. A game may last 5 min or over an hour, but the crashes are inevitable. As soon as a player flags his game for LAA, he never crashes again. Not sure what's going on with the memory usage there, but apparently 2gb isn't enough on some setups.
If it helps, we all run Win7 64-bit, and have at least 8gb ram installed.
Of course me and my friends with these problems can just keep applying the LAA flag ourselves after each patch. It would be nice to have it flagged from the start, though.