Obviously, fireworkx should not be showing a transparent background.
Equally obviously, this is not a bug in xscreensaver. It's a bug in the X server, or in some lower layer like the video driver. You should reassign this.
Is fireworkx the only OpenGL saver that provokes this bug? -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]