by Fred » Thu Feb 23, 2012 6:45 am
Not sure if this will help but i found it in the Windows forum regarding Vertex
"If you have the "Rotation Center" options "Auto" checked "uncheck it" and "Use Selected Set" in the popup menu, the plug-in should be picking up a point over the selected set. Try moving the selected set to the middle of the view and see if you now have the behaviour as you expect."
Otherwise one of the programmers may be of assistance.
I believe they made modifications to fix another issue..