I have done something quite silly and not sure how to fix it.
I modified some of the gnome keyboard short cuts and was trying to disable the "Run Application" command. In the process I assigned it to the delete key and every time I hit delete the "Run Application" window comes up.
It would not normally be a problem but the "Keyboard Shortcuts" no long has the short cut in the window so I can't disable it.
Any help advice would be appreciated.