This is a funny one.
The Register posted that Voodoo 3 and Voodoo 5 cards from 3DF/X are not working on motherboards for Intel's latest flagship, the Pentium 4.[BLOCK]3dfx's P4 FAQ shows the problem rather neatly, but to summarise: 3dfx's Voodoo 4 4500 has a universal AGP edge connector - it's got two guide notches cut into it - and so will connect to 3.3V, 1.5V and Universal AGP ports. The Voodoo 3 and Voodoo 5 5500 boards, on the other hand, have 3.3V edge connectors - you can tell from the single guide slot at the back-plane end of the card - and so won't fit into 1.5V AGP ports.

And... er... Intel's P4 mobos only have 1.5V AGP ports. Had Intel implemented universal ports, 3dfx wouldn't have run into trouble. [/BLOCK]The biggest joke is that only 3DF/X is having this problem. None of all the other manufacturors of videocards have problems.
Seems 3DF/X is going down slowly but steadily :)

In other news: