NSURLIsExcludedFromBackupKey can not be set correctly

Question

I am trying to prevent a whole folder from beeing backed up by itunes. I followed the Technical Report http://developer.apple.com/library/ios/#qa/qa1719/_index.html But it seems

Answer 1

Same problem for me. I also solved it changing the way I called addSkipBackupAttributeToItemAtURL That's the correct way:

[MyClass addSkipBackupAttributeToItemAtURL:[NSURL fileURLWithPath:path]];