THANKS for this post!
I thought I was seriously losing my mind....
I saw Ed's post earlier on with a link to 6.5.6 Release Notes. I immediately did a search for 'NetBackup 6.5.6 Release Announcement' and found nothing... That was about 2 hours ago...
NetBackup 6.5.6 includes the VSP disable tool (bpvspdisable.exe) for
administrators to use to disable VSP on clients if it is not needed. The tool deletes
the VSP cache files from the disk of the client system. All future VSP requests on
those clients are redirected to use Microsoft native Volume Shadow Copy Service