I've migrated from 4.0 to 4.5 and my monkeypatched SystemManager has errors. There errors appear on the lines that contain the var 'this'. each error containes 3 lines of errors that are exactly the same:
1067: Implicit coercion of a value of type mx.managers:SystemManager to an unrelated type mx.managers:SystemManager.
When i try to a new monkeypatch from SystemManager i still get the errors even if i don't add anything to the file!
Note: i'm also using the same Flex 4.1 sdk, so the sdk has not changed.