Если кого интересует ответ разработчиков:
This is a known problem of 3DE/NT. To be honest, we were not able to fix this bug, because we couldn't reproduce it.
It seems, that there is either a problem with NVidia's or even Microsoft's OpenGL drivers. Please try to install the latest drivers for your GFX board.
By the way, we are using 3DLabs boards under NT, without any problems...