J2SE Version (please include all output from java -version flag):
 5.0, 5.0u1, 5.0u2

Does this problem occur on J2SE 1.4.x or 5.0.x ? Yes / No (pick one)
  No, works fine with 1.4.2

Operating System Configuration Information (be specific):
  WinXP and XP look and fell

Bug Description:

   Discovered a performance decrease in JDK 1.5. The problem happens when the
   look and feel of Swing is Windows, and the operating system is Windows XP and
   the look and feel of Windows is XP (as opposed to Classic).

   The application has a tabbed pane and it takes a lot slower to repaint with
   JDK 1.5.0_02 than with JDK 1.4.2_08. JDK 1.5.0_01 and JDK 1.5.0 have the same
   problem. Attached is an export file from OptimizeIt showing where the slowdown
   is (jdk1.5slow.html). Also attach 3 snapshots saved with Borland OptimizeIt
   Suite 6.0.
 
Steps to Reproduce (be specific):

   To use Tomsawyer's main demo. Just log into the www.tomsawyer.com website.
   use javasoft account, check password on comment field.
   Then go to

     http://www.tomsawyer.com/temp/tsvj.700.jnlp
 
    To run the demo.
    Run it with JDK 1.4 and JDK 1.5 and compare the performance of the following
    operation:
 
    1) In the main menu, go to Tools | Create Nodes.
    2) Quickly click on the white canvas multiple times in different
       places and you'll see yellow rectangles appear in those places. The
       repainting rate and general performance is much slower in JDK 1.5

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