<HTML>I noticed upon installing QT 5.1 that I now have a QT DV Firewire Enabler 2.3 extention (in the QuickTime Extensions Folder) in addition to a Firewire Enabler 2.3.3 in the system extentions folder. This was not so in QT 4.1. Is this QT DV Firewire Enabler extention necessary or just redundant?</HTML>