J2SE Version (please include all output from java -version flag):
 6u10 build 31


Does this problem occur on J2SE 1.4.x or 5.0.x or 6.0? Yes / No (pick one)
 This problem does not occur with 1.4, 1.5, or 1.6_07.


Operating System Configuration Information (be specific):
  MS Vista Service Pack1, not on XP Service Pack3.
  In Vista, Aero is enabled.

Hardware Configuration Information (be specific):
  have the latest graphics adapter drivers installed for my
  Mobile Intel 965 Express onboard chipset on a Lenove Thinkpad T61.

Bug Description:
 where a dialog lacks the complete background and seems to be transparent.
  Find attached two screenshots that show how it should be and the bug where
  the screen background shines through.

Steps to Reproduce (be specific):
  Just open a JDialog. From time to time the screen shines through
  and the dialog content is not painted. If resize the dialog, you will get
  the dialog background, if resize again, the whole content is painted.

  Same problem with "-Dsun.java2d.noddraw=true" too.