* BGHUDAPPKIT is no longer under development by me, I hope that the community will keep it alive and going as I no longer have time to dedicate to the project** The missing HUD controls. Please scroll down to read the readme file for an important notice concerning the future of BGHUDAppKit. Note that there are multiple versions available, 10.5+, 10.6.7, and now 10.7. As soon as I learn how I'll make these all one code base if possible.
Make sure you have the latest version (looks like you do), make sure you Clean All if you updated an existing directory. That issue was fixed with that commit.
Xcode 3.2.4 on 10.6.4 core2duo MB compiled commit http://github.com/binarygod/BGHUDAppKit/commit/14d7b61824a29d0781274c6dd56016f5fdd0f4fe double-clicked, Interface Builder started and raised an exception: NSInvalidArgumentException Reason: NSCFDictionary setObject:forKey - attempt to insert nil value (key: NSColor)