user switcher bug?

[Matthias Clasen]

On Thu, 2007-11-01 at 17:33 -0700, David L wrote:
> When I do the following:
> 
> Log on as user A
> Switch to user B (start new session)
> Switch to user A (return to existing session)
> End user A's session (log out)
> Return to user B's session
> Switch to user A (ie, attempt to start a new session) 
> 
> I get a blank screen.  From there I have to hit Alt-F1,
> log in as root from the console, telinit 3 then telinit 5
> to get back to the gdm login.  This is repeatable for
> me (3 for 3).  User switcher bug, or buggy user?  ;) 

I can confirm this. Something gets confused about vt's. 
In the sequence above, 
user A first gets vt7, user B gets vt9, 
then the attempt to switch to user A again from B's session 
brings up a greeter on vt10,
but the user switcher switches somewhere else (vt7 ?)