>>Thanks a lot fellas. The original question was why my submenus open on the left in Win7 but not in Vista. Maybe one of you could do a programme of testing at full moon with left-handed customers ....
>I've always felt there was something sinister about left-handed people...
>
>Here's an odd question: Does the behavior change between using Aero and not using Aero?

Brilliant! It does change. In Aero, to the left. With Aero switched off (looks like Classic Windows), to the right. Any clues on what to do next?