Sadly enough you're not alone.
VMWare server has been crashing my hosts on all dual-dual machine with kernels >= 2.6.19.
Hopefully VMWare will address this issue ASAP.
Funny thing is, I've had the budget to buy support from VMWare, but because Fedora is not supported (under both Server and Workstation), I lost it
I had previous issues with AMD64 Linux kernels..
I switched to Debian based i686 kernel. Works just fine now.
There's people saying AMD64 + Debian + VMware Server == but I am willing to give it a shot some other day. All I care is stability at first, performance comes second in line.
Actaully, the problem is not (AFAICS) x86_64 vs. i686 nor is it Fedora vs. Debian.
Debian Etch, like RHEL/CentOS 5.0 is based on the 2.6.18 kernel - which,
AFAIK, is the last stable kernel. (w/ VS <= 1.0.3)