unknown type in debugger

FROM : Steven W Riggins
DATE : Sun Jan 27 08:51:38 2008

When I opened my iPhoto plugin project in Xcode 3, it asked me for a 
new base directory.  I chose the directory my project is in.

Now, when I build a development version (there is an alias for the 
plugin folder which points into iPhoto), and debug, all symbols say 
"unknown type" when I pass my cursor over them.

Any idea what is confusing the debugger?  How should I be building 
this plugin for debugging with iPhoto?