One 2 separate occasions, one right after the other, multitouch gestures stopped working on my MBP. Both times, they seemed to have occured when my wifi cut out. Now, I am not a reliable test subject for the wifi problem others seem to be having, because my wifi itself isn't reliable here. It could just be coincedence that the gesture problem is happening at the same time as the wifi cutting out, or they could be related. I noticed it both times while I was using Messages and a message I was sending got hung up, because the wifi cut out. Either way, when it happened the first time, multitouch gestures came back after a few minutes. The second time, they didn't at all. I had to restart the MBP to get them back. Anyone else?