FULL PRODUCT VERSION :
java version "1.6.0-ea"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-ea-b52)
Java HotSpot(TM) Client VM (build 1.6.0-ea-b52, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux ce 2.6.13-1.1526_FC4 #1 Wed Sep 28 19:15:10 EDT 2005 i686 i686 i386 GNU/Linux


A DESCRIPTION OF THE PROBLEM :
When switching to GTK-LaF and moving the JInternalFrames arround very fast in the swingset2 demo strange artifacts show up.

(I could send a screenshot via mail if needed)

They happen after some time of movin the Frames from top to bottom very quickly and I was able to reprodice it using both the X11 and the OpenGL java2d pipeline.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1.) Start the SwingSet2 demo
2.) Switch to GTK-Laf
3.) Move the JInternalFrame up and down, circle them a bit and you'll see strange artifacts on the tabs.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
no artifacts
ACTUAL -
artifacts (see screenshot)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
(I could send a screenshot via mail if needed)
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
use Ocean L&F