On the 1st training mission (i only just got it to work), i was playing about with the jumpjets while going to the last checkpoint. as i landed i pressed the button for jumpjets (exactly as my mechs feet hit the floor) and it flew, like 200 feet into the air. I am now stuck as i have no jumpjet power left (it doesn't recharge anymore) all i can do is turn left and right as my mech is floating at a constant approx. 30 mph (the speedometer says i am doing 0mph). If you don't believe me, check out these screenshots. I haven't used cheats, hacks or image editing software. lol i hav no idea what is going on =P

http://img367.imageshack.us/my.php?image=mechflying16zl.png
(this one you can just about see the lighthouse at the bottom)

http://img70.imageshack.us/my.php?image=mechflying24fn.png
(this one you can see my shadow in the bottom left)

http://img295.imageshack.us/my.php?image=mechflying37rx.png

Also i found out that this can happen to other computer controlled mechs. in instant action a random enemy mech started flying and in the 4th training mission, the APC you have to kill started to bounce crazily 400m into the air. it happens when u walk off of a small sheer cliff of hill, it just flys. =P what is going on????

i don't know if this was answered anywhere else, but there is a fix.

go to the start menu. run. type in: dxdiag.exe then go to more help and override. set override to 60. this sets your refresh rate to 60 hz. it fixes the bouncing issue