Are you using Maya 2011?
Did you customize pv_performAction.mel in Maya 2009, and now your customization is not getting called?
Don’t worry. What you want to do is override FileMenu.mel. That’s the new save action hook.
Assuming you’re on a Mac, it’s at /Applications/Autodesk/maya2011/Maya.app/Contents/scripts/startup/FileMenu.mel.
I’d say “you’re welcome” but it was Justin that figured it out.