Comment 162 for bug 401823

the flooding of .xsession-errors and hd activity/waste is most
annoying for the end user.

here's a workaround:
ALT+F2

gnome-session-properties ENTER

"Add"
Name: remove xsession-errors on login
Command: rm -f .xsession-errors*
Comment: cool

That's it. logout and login.

Note that is should be "rm -f .xsession-errors*"
-f means, that if no .xsession-errors* is there rm won't complain.

If you want to check your logfile again just disable the entry in
gnome-session-properties. logout and login.