After installing the latest developer build of Snow Leopard on my Mac Mini, the Forklift app from BinaryNights started to crash on launch.

I found a short article on
http://osgeeks.blogspot.com/2009/08/fixing-forklift-17-for-running-on-snow.html which summarizes a fix:

sudo ln -s /System/Library/Frameworks/AppleShareClientCore.framework /System/Library/Frameworks/AppleShareClient.framework

sudo ln -s /System/Library/Frameworks/AppleShareClientCore.framework/Versions/A/AppleShareClientCore /System/Library/Frameworks/AppleShareClientCore.framework/Versions/A/AppleShareClient

sudo ln -s /System/Library/Frameworks/QuickLook.framework /System/Library/PrivateFrameworks/QuickLookUI.framework

sudo ln -s /System/Library/Frameworks/QuickLook.framework/QuickLook /System/Library/Frameworks/QuickLook.framework/QuickLookUI

sudo ln -s /System/Library/Frameworks/QuickLook.framework/Versions/A/QuickLook /System/Library/Frameworks/QuickLook.framework/Versions/A/QuickLookUI

This worked well for me. Kudos to its author