Running programs via VNC problem with Fedora 11

["Michael D. Setzer II" <mikes@xxxxxxxxxxxxxxxx>]

I'm seeing things that work fine under Fedora 10 not work under Fedora 11.
Here is the latest example. 
If connected via vnc, I can run nmapfe as a regular user, but get the 
limitation message about being non-root. 
If I use su and then run the program the following occurs.

No protocol specified
  File "/usr/bin/nmapfe", line 102, in <module>
    import zenmapGUI.App
  File "/usr/lib/python2.6/site-packages/zenmapGUI/App.py", line 34, in 
<module>
    import gtk
  File "/usr/lib/python2.6/site-packages/gtk-2.0/gtk/__init__.py", line 79, in 
<module>
    _init()
  File "/usr/lib/python2.6/site-packages/gtk-2.0/gtk/__init__.py", line 67, in 
_init
    _gtk.init_check()
No protocol specified
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/bin/nmapfe", line 47, in excepthook
    import gtk
  File "/usr/lib/python2.6/site-packages/gtk-2.0/gtk/__init__.py", line 79, in 
<module>
    _init()
  File "/usr/lib/python2.6/site-packages/gtk-2.0/gtk/__init__.py", line 67, in 
_init
    _gtk.init_check()
RuntimeError: could not open display

Original exception was:
Traceback (most recent call last):
  File "/usr/bin/nmapfe", line 102, in <module>
    import zenmapGUI.App
  File "/usr/lib/python2.6/site-packages/zenmapGUI/App.py", line 34, in 
<module>
    import gtk
  File "/usr/lib/python2.6/site-packages/gtk-2.0/gtk/__init__.py", line 79, in 
<module>
    _init()
  File "/usr/lib/python2.6/site-packages/gtk-2.0/gtk/__init__.py", line 67, in 
_init
    _gtk.init_check()
RuntimeError: could not open display

Since it can run as a regular user, is this a policykit or other error.
Works fine in Fedora 10 and before.

+----------------------------------------------------------+
  Michael D. Setzer II -  Computer Science Instructor      
  Guam Community College  Computer Center                  
  mailto:mikes@xxxxxxxxxxxxxxxx                            
  mailto:msetzerii@xxxxxxxxx
  http://www.guam.net/home/mikes
  Guam - Where America's Day Begins                        
+----------------------------------------------------------+

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