VMWare Server Beta 2 (64-bit)
Ran into an interesting issue trying to install Windows 2003 R2 64-bit on VMWare Server Beta 2 today. The server would boot up constantly saying that I did not have a x64 compatible processor. I had to go into the BIOS of my system and enable my processor's VT option before it would finally recognize that I was running a 64-bit system.
OS: Windows Vista Business SP1 64-bit
Maker/Model: Dell Optiplex 755
Proc: Intel Quad Core2 Q6700 @2.67GHz
VMServer Version: Beta 2 Build 84186