Yes I experienced exactly the same problem when running the game on my Radeon 9250 128mb card.
T3-M4 would freeze after a few paces and then would not be able to move although the camera could be moved and all options accessed.
I had to constantly save the game after each freeze, quit the game completely and reload and advance a few more paces and start the proceedure again.
I tried every combination of the ATI drivers I could find, both official and the Omega versions, tried the fix of putting the Open GL driver from 4.11 in the folder with the latest drivers installed, nothing worked, hell I even installed another operating system completely with no use.
Unfortunately the only way around it I could get to work for me was to replace my radeon card with a GeForce4 card (only cost me