This is reproducible on Solaris 10 JDS system. The bug is reproducible with mustang b57

Run the regression testcase java/awt/SplashScreen/test7.sh. Minimize all other windows. The testcase first shows a splash screen having sun logo. The second image shown is supposed to be transparent image, but the image shown is having a black opaque background. Now restore one of the windows so that it hides the splash screen. Minimize thw window now. It can be seen that the splash screen has become transparent now. After a few seconds, the splash screen is supposed to show sun logo again. But only a portion of the logo having the shape of the transparent image is shown.