Interface Builder is the first GUI builder I’ve ever used that I didn’t really hate. But it still has its drawbacks.
I have quite a few ideas for improving Blapp. I’d love to help Michael McCracken by adding some of these features myself (that seems better than becoming “that pest who asks me for three new features a day”). But that’s going to be difficult, because you can’t really send patches against the objects.nib file.
I suppose this is just a special case of the problems inherent in collaborative GUI development, but it’s still annoying.