For those that use VMware's vMA vi-fastpass authentication (vifpinit which is now vifptarget) which allows a user to perform an operation on an ESX(i) or vCenter host without having to provide credentials each time, may notice a change with the resxtop command. In vMA 4.0, if you initialized a fastpass target you could run resxtop against the host without having to provide additional credentials to the host.
VIMA 1.0 - Oct 27, 2008 - Feature not supported and marked as a known issue.
Even though I consider this a bug, VMware did document this change as a "known issue" in the release notes. I am not sure if this feature will be resolved in a future release, but it just seems odd that we are taking one step backwards in terms of functionality.