As you have found, the edgers PPA can be very unstable - it is frequently updated. Some updates are OK - some will break your system.
My general advice would be - if you find that a particular update from edgers work for you, then untick the box in software sources for the edgers PPA, so no further updates are received which can break your system.
I note that you are using both the edgers PPA and Kernel 2.6.39-3. Can I ask why?
You perhaps can either wait for a few days to see if a further update to edgers works - or you can ppa_purge the edgers PPA to return to a known Natty build configuration.
If you want to do a ppa_purge, then in a terminal:
sudo apt-get install ppa-purge
sudo ppa-purge xorg-edgers
You may have to also boot from the standard Natty kernel, 2.6.38.x