Comment 15 for bug 144406

Ubuntu 9.10 (Karmic) 32-bit with all the current updates
3D-accelerated proprietary graphics driver for ATI cards is on.

$ uname -a
Linux piotr-desktop 2.6.31-20-generic-pae #58-Ubuntu SMP Fri Mar 12 06:25:51 UTC 2010 i686 GNU/Linux

$ java -version
java version "1.6.0_0"
OpenJDK Runtime Environment (IcedTea6 1.6.1) (6b16-1.6.1-3ubuntu1)
OpenJDK Server VM (build 14.0-b16, mixed mode)

Problem shows up when running Matlab R2009b 32-bit . When Compiz is running and more than one Matlab window is opened sometimes one or two Matlab windows disappear from GNOME panel. They are available through Alt+Tab or Turbo+Tab. When Compiz is disabled it works OK.

BTW, Scilab 5.2.1 seems to work fine, though it's build around Java graphics as well.

  Cheers,
 Piotr