So others can avoid the lesson I learned this morning, VMware Server 2 stopped working after upgrading to 5.6 from a working 5.5 install (with the libc workaround for 5.4+ already in place).
Some Google-Fu indicates the problem is linked to more supporting libraries being changed (zlib, libxml2, possibly others) in addition to the existing libc issue. I get a segmentation fault trying to launch VM Server 2 and have been unsuccessful so far in getting my install to work again.
My own solution is I am rebuilding the physical hardware for KVM support and temporarily hosting the VMware VMs on a second machine I have still running 5.5 as I transition to KVM since it became apparent some time ago that VMware Server 2 is no longer a tenable platform.