title: NSDateFormatter show wrong year
body: <p>im using xcode 4.5(4G182) with iOS 6. NSDateFormatter show wrong year in iOS 6, how to solve?</p>
  
  <pre><code>NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
  [dateFormatter setDateFormat:@"YYYY-MM-dd"];
  NSString *str = [dateFormatter stringFromDate:[NSDate date]];
  NSLog(@"%@ == %@",str,[[dateFormatter dateFromString:str] description]);
  </code></pre>
  
  <p>it print out "<strong>2012</strong>-09-14 == <strong>2011</strong>-09-13 16:00:00 +0000"</p>