||Build Your First Cocoa App|
|Subject:||which version of ProjectBuilder and InterfaceBuilder?|
Response to: which version of ProjectBuilder and InterfaceBuilder?
I assume I'm using these versions as well, since they came from the same source. I also had the problem of the .nib files not opening from Project Builder. After I opened one directly from Interface Builder the other one started behaving as expected. It seemed that X just needed a little file extension guidance.