F4LL0UT: What still doesn't work is in-game popups (for instance when reading road signs). They are invisible and only flash up for a single frame when moving on. Tried fixing it with a ddraw wrapper, it even worked, but at the cost of messed up inconsistent performance. I think the game remains beatable without them but if I'm to give this game another go I want it to be perfect. :P
Having now played the game a bit on two different Windows 7 laptops:
NVidia Geforce GTX 670M GPU: I get that same issue you described.
Intel HD 4000 GPU: No issue with this, I see the road sign pop-ups fine.
There is another minor visual glitch with Intel that I don't see on the Geforce, namely in the menus the mouse pointer causes some flickering across the screen, as if there are several mouse pointers side by side. It's not a biggie though, you can still easily tell which is the actual mouse pointer.
Also for some reason the graphics are stretched to 16:9 widescreen on the Intel HD (4:3 with black bars on the sides on the Geforce, ie. the correct aspect ratio), but maybe this can be changed somewhere in the driver's settings. Then again I think in other 4:3 games I do get the correct aspect ratio...
Other than those, they seem identical. Maybe I'll play it on that Intel HD 4000 then, just to see those signposts, albeit so far they usually don't seem to have anything really important.