Hey Neil, the picture you are showing above looks good, but when the fish fly at you and are firing their shots, you don't see the fire sometimes and the screen where you fly through a maze, the maze disappears. I was running the latest MAME and also tried 0.180 (which is what i use for qbert and the games that use the samples for Votrax speak synthesizer which MAMEs emulation hasn't perfected yet), but even that one didn't display it properly. I read somewhere that something broke in MAME after 0.173 that affected Major Havoc so I now use 0.173 to play Major Havoc.