Context Menu Fly Out Direction

With Windows XP the context menu would fly out to the left or the right, depending on how close it was to either the left or right side of the screen. in my VHP 32bit OS, for some reason, the context menus such as Send to, MagicISO, and Open With tend to favor flying out (opening) the left, unless the context menu is envoked on the extreme far left of the screen, then they fly out to the right side of the menu as usual. So for instance, if I right click on something in the exact middle of the screen, and choose Send To, the menu flys out (opens) to the left of Send To instead of following the direction of the Send To -> (arrow) which is on the right. This happens even when right clicking on the desktop itself, it just seems to favor the left. Anyone know the registry key where to adjust the direction sensing of the context menu? Or at least so it would favor the right instead of the left?