Just reporting an issue I encountered (I already fixed it with a .902 reflash) but I created a nand backup earlier, when the phone rebooted It got stuck in a bootloop at gummy. So of course i rebooted and tried to get to CWR, the recovery was gone. I used RSD lite to fix it, motofail to root (again) then got CWR and Bootstrap back on. I restored the backup and got stuck in the same loop.
I'm not sure where the problem occurred, but to fix it I had to use RSD lite again, root again, then just did a clean flash of Gummy ICS.