There are several threads in Apple's QuickTime Discussions Board citing problems playing QuickTime movies in Explorer, especially the movie trailers on Apple's site (see one and two, for examples).

Several readers have reported an issue where embedded QuickTime content on Web pages will not play properly after the update. MacFixIt reader Mark Feldman writes: "After updating to QuickTime 7.1, ...

It's easy to overlook the power of the steady and dependable QuickTime Player. Built right into OS X, many users don't necessarily think of it as a sophisticated app. Despite that, Apple has ...

Though long considered the de facto format for delivering video content, QuickTime may look out of place in this roundup. The QuickTime player serves a very specific purpose: playing QuickTime video ...