Some more info from me:
I have a Windows 7 64-bit partition and a Ubuntu 10.04, on the same machine, which has an Nvidia GTX275 card. I've tested the game on both partitions.
The first time I ran the game, it resulted in a complete and instant system crash on both partitions; an instant black screen with the monitor going in stand-by.
The second time I ran the game on both partitions, it worked.
The first puzzle is okay; but on Linux, and only on Linux, the second puzzle suffers from the z-order issue, where the piece of paper with the logs are clearly placed beneath the field where the logs are to be placed. Still, the logs are visible when you drag them around. (Trial and error to find them first).