title: access to plist in app bundle returns null
body: <p>I'm using a piece of code I've used before with success to load a plist into an array:</p>
  
  <pre><code>NSString *filePath = [[NSBundle mainBundle] pathForResource:@"species_names" ofType:@"plist"];
  NSArray *array = [[NSArray alloc] initWithContentsOfFile:filePath];
  </code></pre>
  
  <p>The initWithContentsOf File is failing (array is null, suggesting it can't find the plist in the app bundle).  </p>
  
  <p>Under the iPhone simulator I've checked that the path created by the first line points to the app file (it does), and used the Finder context menu "Show package contants" to prove to myself that "species_name.plist" is actually in the bundle--with a length that suggests it contains stuff, so it <em>should</em> work (and has in other iOS apps I've written).  Suggestions most welcome...</p>
  
  <p>[env Xcode 4.2 beta, iOS 4.3.2].</p>