For many years Apple identified which version of the Mac OS (US English or International-English) was installed by listing it in "About This Computer".
English (US-English) was, for example, "System 7.6.1"
English (International-English) was, for example "System Z-7.6.1"
Now that QuickTime 5.0.1 is released... on the installer download page (http://www.apple.com/quicktime/download/standalone/) Apple states...
"Please note that the US download should only be used with US versions of Mac OS."
On my computer "About This Computer" states "Mac OS 9.0.4" yet some of the extension items are "Mac OZ Z-9.0". Is my Mac OS US-English or International-English and will installing QuickTime 5.0.1 (US English) cause problems on my Mac (if it is indeed the International-English version of the Mac OS)?
I wish Apple would clear this up.