I have installed Sabayon and was playing around tweaking the aiglx stuff until I can no longer revert the the original look and behavior. In Ubuntu whenever I reach this point I just erase all my hidden configs (the . files in my home folder) and after I relogin all will be as it was the first time I logged. since experience dictates i did this and after relogging what I got was the default GNOME or KDE look and behavior, not Sabayon's. I have to reinstall to get it back.
So the if ever I am stuck again how do I revert to Sabayon default.