Had installed fedora 16 3.3.2-1.fc16.i686 after update
1) GRUB boot menu changed. Options, that I added, was removed. I don't ask it. Why and for what?
2) new kernels (3.3.2-6 and 3.3.5-2) stop booting on "Starting sendmail mail transport agent".
3) old kernel boot normal. But I couldn't start Nautilus.
4) after reboot old kernel do same as in 2).
I don't know, what caused this problem.