I am setting the maximized bounds for a frame to 0,0, 300, 300 and maximizing the frame by calling setExtendedState(). When I execute this application on Solaris9 with GNOME, the maximized bounds.width, height are not honored and the frame gets maximized to the full size of the screen. When I execute on CDE, maximizing operation is not supported. On Win32, this works fine.
I also tried this on RH9 with GNOME and this seems to be working fine. On RH8 with GNOME, maximized state is not supported.

I have attached a sample testcase. Execute the sample test on Solaris 9 with GNOME session. If the frame gets maximized to the size of the screen, then the bug is reproduced.

This is reproducible right from JDK1.4+.