Mission 5, where you have to intercept the convoy. When I give my 2nd infantry squad a move order, one or two of its members will glide at ridiculous speed towards the enemy base. They don't stop whether I cancel the order or give them a new one in the opposite direction. I've tried setting CPU affinity to one core and XP SP2 compatibility to no avail.

Win 7 64 Ultimate
Intel E8550
4gb DDR RAM
GTX 550 Ti