Xcode 4.1 fails to install on my Snow Leopard Mac OS X 10.6.3

I recently downloaded Xcode 4.1 to install on Snow Leopard Mac OS X 10.6.3, however it fails to install. When I clicked to install the package, it gives me a "com.apple.installer.pagecontroller error-1" and says it fails to install. Does anyone know why this might be the problem? Thanks in advance!! (I have paid the $99 and joined Apple development).

Solution

Original answer:

Xcode 4.1 is for Lion only, and won't run on Snow Leopard.

For Snow Leopard, you'll have to use Xcode 4.0.2 instead. (Or upgrade to Lion.)

Update after helpful comment by @gcamp:

Xcode 4.1 for Lion was released Jul 20, 2011.
Xcode 4.1 for Snow Leopard was released Aug 29, 2011.

How did you download 4.1? The version currently available in the App Store lists "Mac OS X 10.7 or later" as a requirement, so it's the Lion-only version. To get the Snow Leopard version, you have to download it directly from iOS Dev Center.