I came across this bug in Matlab R2008a and R2009b under Ubuntu 9.04 and 9.10. The application may disappear from gnome panel if you minimize the window. If you use Alt-Tab and show desktop Ctrl-Alt-d the problem does not show up.
Switching from Compiz to Metacity
$ metacity --replace
fixes the problem for me. Compiz provides nice desktop effects, so I think going back to Metacity is not a solution: the solution is to fix Compiz.
$ uname -a
Linux zver 2.6.31-20-generic #58-Ubuntu SMP Fri Mar 12 05:23:09 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)
I came across this bug in Matlab R2008a and R2009b under Ubuntu 9.04 and 9.10. The application may disappear from gnome panel if you minimize the window. If you use Alt-Tab and show desktop Ctrl-Alt-d the problem does not show up.
Switching from Compiz to Metacity
$ metacity --replace
fixes the problem for me. Compiz provides nice desktop effects, so I think going back to Metacity is not a solution: the solution is to fix Compiz.
$ uname -a 6.1-3ubuntu1)
Linux zver 2.6.31-20-generic #58-Ubuntu SMP Fri Mar 12 05:23:09 UTC 2010 i686 GNU/Linux
$ java -version
java version "1.6.0_0"
OpenJDK Runtime Environment (IcedTea6 1.6.1) (6b16-1.
OpenJDK Server VM (build 14.0-b16, mixed mode)