No x11 gs device for users, only root?

[Bruce <bestb@sympatico.ca>]

I am running Debian woody/sid, and noticed that kghostview could not 
display ps or pdf files (would produce error "Unknown device: x11"). I 
thought this was odd, as certainly the gs package I am using has X11 support 
(gs 6.51 from sid). I then noticed it worked fine if I was root. For some 
reason, the devices available to gs are different dpending on whether I am 
logged in as a user, or logged in as root, i.e., 

	linuxbox:/# gs -h
	GNU Ghostscript 6.51 (2001-03-28)
	<snip>
	Input formats: PostScript PostScriptLevel1 PostScriptLevel2 PDF
	Available devices:
	   x11alpha bbox x11

and so on, but as a user,

	bruce@linuxbox:~$ gs -h
	GNU Ghostscript 6.51 (2001-03-28)
	<snip>
	Input formats: PostScript PostScriptLevel1 PostScriptLevel2 PDF
	Available devices:
	   bmpmono bmpgray

and so on, with only about 1/2 of the devices that showed up when the command 
was run as root.  

Is this supposed to be like this? Why would the devices available be 
different? How do I give users access to the same gs devices as root? As it 
is, the result is that Kghostview only works if you are root.

I am not sure if this is a Kghostview problem, a ghostscript problem, a 
packaging problem, or just a configuration problem specific to my machine, so 
apologize in advance if this isn't really the right group to ask this 
question.

Bruce