I've been holding out on updating to 10.7.2 for a two weeks now since many people claim they have problems with slow os expose and mission control. Today I decided i'll give it a try and my MBA downloads the files, installs and machine reboots to kernel panic. Tried a few restarts, also in single user mode, everything ends up with kernel panic. Did a disk check and permission repair from recovery partition, still no help. Now reinstalling Lion over internet says its gonna take 55 hours! 55 hours I'm on a 6 mbit connection and 4-5GB should take like 2 hrs..