How do I know if the patch is "installed correctly"? I deactivated the patch and then re-activated it. I still have the "T" key problem. Could the problem be with Strategy First version of the game?
One of the tell-tale signs is the existence of 10 'user-made' missions, featuring extra maps not normally available. This was 'patched out' in the Unofficial Patch.
Some users also had a problem seeing the gunsight markings for the Panzer IV, which was corrected with the patch.
If the problems persist, you could download the unofficial patch again and activate it.