Hello there,
I had the same problems, but it is not LiveWare 3! I used the Win2k built in drivers
with Diablo2 and I had the same problem.
Then I decided to switch from D3D to DirectDraw 2D and now it works fine! I've beaten Diablo now for 3 times and the problem came never up again.
It's your 3D Accelerator card:
I tested 3 Boards:
ATI RagePro
nVidia Riva TNT
S3 Savage2000
They all work fine in DDraw, but in D3D there is a heavy loading activity while playing the game. I think it is a buggy driver. I tested different AGP Aperture size settings: it didn't help.