Description of problem:
If you switch the contrast setting from High to High/Inverse or Low, nothing happens.

Version-Release number of selected component (if applicable):
control-center-2.91.90-2.fc15.x86_64

How reproducible:
Every time.

Steps to Reproduce:
1. Log into the GNOME Shell.
2. Click on User Name (top right-hand corner)
3. Choose System Settings from the drop-down menu.
4. Choose Universal Access from the list.
5. Under the "Seeing" tab, switch the contrast from Normal to High.  The colour scheme changes.
6. Now switch from High to High/Inverse.  Nothing happens.
7. Now switch from High to Low.  Nothing happens.
  
Actual results:
Doesn't change.

Expected results:
Colour theme should change.

Additional info:
Ironically, at the moment, "Normal" seems much higher contrast than high, due to the strong white background in these theme, whereas High has the softer grey theme.  I suspect the themes have actually been given the wrong names (sorry in advance if I am incorrect about this and they are right.)