Comment 19 for bug 297890

I can reproduce this error (with whole screen is white and a mouse pointer) by create a new user, and adding this line

<entry name="accessibility" mtime="1225138994" type="bool" value="true"/>

to

/home/username/.gconf/desktop/gnome/interface/%gconf.xml

ALT+TAB works, when you kill cheese you can continue work
(maybe this entry created in Hardy and not modified during upgrade to Intrepid)