Ubuntu :: ICEauthority - Could Not Be UPDATED

I cannot use ubuntu. Somehow, I managed to get a working terminal from the recovery mode.

I wanted, still do, to change my username. hihihi100 is my old username, the new one is dexter: I changed it in the user and groups section, and moved everything from the /home/hihihi100 folder to the home/dexter folder. In the terminal I can see all the files, none is lost, all are owned by dexter of the group dexter hihihi100 folder is gone

Now the bug, or more precisely, where I realised I had f*kked up:

My machine loads normally, untill I reach the login screen, where I am prompted to choose a username and a password: after doing so my 11.04 will only show 3 different messages:

NOTICE THAT hihihi100 is gone, all the information of that folder is now in dexter (/home/dexter)

Code: could not update ICEauthority file /home/hihihi100/.ICEauthority

There is a problem with the configuration server. (/usr/lib/libgconf2-4/gconf-sanity-check-2 exited with status 256)

Nautilus could not create the following required folders /home/hihihi100/Desktop, /home/hihihi100/.nautilus

I dont understand why my machine wants to create folders inside hihihi100, a folder that does not exist anymore