FULL PRODUCT VERSION :
java version "1.6.0_03"
Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
Java HotSpot(TM) Client VM (build 1.6.0_03-b05, mixed mode, sharing)


ADDITIONAL OS VERSION INFORMATION :
Ubuntu 7.10

EXTRA RELEVANT SYSTEM CONFIGURATION :
A default Ubuntu 7.10 installation (this does include Compiz)

A DESCRIPTION OF THE PROBLEM :
  Bug 6429775 fixed this partially, but not completely.

It no occurs, in my estimate over 20% of the time.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Install Ubuntu 7.10 (www.ubuntu.org)
Use a java program and open dialogs frequently.

I've seen it a lot in the color picker of Sweet Home 3D:
http://sweethome3d.sourceforge.net/SweetHome3D.jnlp

But also in Intellij's refactor-> rename dialogs:


Others in Bug 6429775 speak of Netbeans etc.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Get a dialog with swing components
ACTUAL -
Get a gray dialog.
The funny thing is if you know what you should be seeing, you can actually use your keyboard input to modify stuff: you just don't get any visual feedback.

REPRODUCIBILITY :
This bug can be reproduced occasionally.

CUSTOMER SUBMITTED WORKAROUND :
close and reopen the dialog and hope you're lucky the next time