I can´t login anymore with my default account. I tried deleting a bunch of the default gnome hidden files but no diff. When it comes to the login screen and I enter the details and hit enter, it just gives me a blank brown screen with the mouse cursor
This has happened before, but I could always fix it by removing the gnome config files in the users folder, i.e. mv .gnome2 gnome2_bckp,but to all the gnome and metacity related ones, it just makes new ones when I try to login after that and I always end up with that blank screen. Tried using "failsafe" session, same thing.
What Can I do to fix this? I really need it fixed.

Hmmm. Try creating a new user and logging in with that. See if it makes any difference.

Check your log files, especially in your /home/username/.xsession-errors and /var/log/auth.log

check /home/username permissions

Can you log into the console fine when pressing ALT+F1?