Your versions of the headers may be messed up, since they're Private Framework headers, not official Apple headers.
Two possible solutions:
Redownload the headers from a better source. rpetrich's versions are often recommended.
If that doesn't work, edit the headers manually to fix the problem. Find the header containing the
PSController
protocol (probably PSController.h), check what typespecifier
is supposed to be, and then make the change inPSViewController.h
. I believe I had to do something like this the first time I was dealing with Preference Bundles.