The Leopard version (7.6.9) attempts to place QuickTime 7 in the Applications folder and because it sees a copy of QuickTime Player already in place, it balks. Because the installer doesn’t see another copy of QuickTime in that location, it’s happy to proceed. When you install the Snow Leopard version (7.6.6) the installer places QuickTime 7 in your Utilities folder. Although the version number is higher, this is actually the version intended for Leopard. What you’ve undoubtedly downloaded is QuickTime 7.6.9. You need QuickTime Player 7.6.6 for Mac OS X v10.6.3 (the version designed for Snow Leopard). The problem is that you’ve downloaded the wrong version of QuickTime 7. The installer tells me that a version of QuickTime is already installed and won’t let me proceed. When I try to install it though, it won’t. It doesn’t, so I downloaded the latest version of QuickTime 7 from Apple. When I installed Lion on my iMac I wiped its hard drive and then installed Lion “clean.” After the installation I was playing around with QuickTime X in the hope that it would allow me to edit movies to the extent that I could with QuickTime 7 Pro. Reader Randy Immel wants the best of both worlds on his Mac.