Originally Posted by davidfor

The difference is that on the PC, the menu reacts and expands when you put the cursor over it, but doesn't trigger the link. You can then select the sub-item you want. On a touch-only device, you have to tap the menu item to have it expand the menu. But, tapping the menu item also triggers the link it points to and once that happens, the sub-items cannot tapped.

Overall, not a great design. And it is also something that I can understand being missed during testing. They probably do most of the widescreen version testing on a PC and concentrate on the portrait version on the devices.