Our plugin adds an extension to the VMWare HostSystem node under the Manage section. The XML fragment for this is attached; it works correctly on 6.5U1b, but no longer appears on 6.5U1d.
Have the requirements for this extension point changed yet again in 6.5U1d? We've had to make changes to this specific extension point for almost every update to vCenter Server 6.5 - is this going to be stabilised at some point?