6333613 describes flickering when using the JOGL Java / OpenGL binding on Java SE 6. It turns out that when running a window manager that supports live resizing, such as the Java Desktop System on Solaris/x86, the same basic problem is present in the X11 AWT implementation.
Please provide an implementation in sun.awt.X11.XToolkit which overrides disableBackgroundErase(Canvas) and does the same thing that the Windows AWT implementation does in sun.awt.windows.WToolkit.
This has been pointed out recently on the JOGL forum at javagaming.org, so it is affecting end users. Please backport any fix to at least the Java 6 update release train.