Comment 12 for bug 660260

If someone who can duplicate the issue has time, they can start renaming dotfiles (such as ~/.dmrc ) and also use diff to compare the files in the affected user's $HOME with those in a freshly created user account $HOME to see what the differences are.

ls -ld ~/.[0-9a-zA-Z]*

should display the set of files and directories of interest. Don't upload anything private (like ~/.ssh or ~/.gnupg contents!) here, but maybe

  tar zcvf ~/dotconfig.tar.gz ~/.config

and then uploading dotconfig.tar.gz might be worth doing?

The same goes for .gconf* and .gnome* stuff, I suspect.

I'm not enough of a GUI/X/window manager/DE person to know which files in $HOME are the likely culprits, but hopefully the above is a start.