When starting gdm as non-root I get: $ gdm Only root wants to run x^hgdm (notice the `x^h')
*** Bug 22881 has been marked as a duplicate of this bug. ***
I'd say that's an intentional joke ;-> (hint: ^h is backspace)
Yes, comments in the source indicate it's supposed to be funny. I'm not sure it makes that much sense, but... ;-)