iOS Crashing Detail disclosure

[isaaclimdc]

Hi all, I'm trying to develop my first *proper* iPhone app after some practice using several books.

Can someone please help me look at my project file to see why oh why my application is crashing when trying to click into a person's details in the Directory cell?

http://thequantumbyte.com/files/Tartan.zip

Do I make sense?

Any help is greatly appreciated.. Thanks