udev problems while upgrading debian lenny to squeeze

If you are upgrading to squeeze from lenny debian, then there are great chances that you will get stuck while the system tries to upgrade udev. There are two ways to deal with the problem
A) install the new kernel using "apt-get install" , boot into it, and then run dist-upgrade
B) "touch /etc/udev/kernel-upgrade" , and then run dist-upgrade
Hope this saves some of your precious time.

Reference : http://forums.debian.net/viewtopic.php?f=10&t=52360