Short question:
What is at fault: LFS or my graphics card?

The game runs flawlessy, but it's like driving blindfolded.

From the looks, it could be the card, have you checked the temperatures lately?

I have the same problem. To solve it I turned off my GFX card and just use the normal one on my PC.

I believe mine is faulty, but the company I got my PC through has suddenly disapeared, so I am left with a broken Nvidia 6600.

Quote from (-Mark-) :

From the looks, it could be the card, have you checked the temperatures lately?

No, but it's already older than five years, so my thoughts are very much along these lines. This post was just to make sure this is not a known bug in LFS.

Quote from VTiRoj :

I have the same problem. To solve it I turned off my GFX card and just use the normal one on my PC.

I believe mine is faulty, but the company I got my PC through has suddenly disapeared, so I am left with a broken Nvidia 6600.

It happens rarely, like once a month or so, so it's not that much of a fun spoiler and the big distortions often disappear after some time anyway.

Quote from VTiRoj :

I believe mine is faulty, but the company I got my PC through has suddenly disapeared, so I am left with a broken Nvidia 6600.

You should be able to RMA it via the company that imports the card or straigth with Nvidia.