facebook/facebook-ios-sdk — pull request #522 by ugiflezet (2013-03-02 13:42:28+00:00)
Title: FBProfilePictureView can clear image before refresh

This solved a bug when using the FBProfilePictureView in a tableview cell and when scrolling up/down the table fast enough , the wrong profile image would be displayed until the new one is fetched

This pull request does change the existing behavior to use one should set the:
```@property (nonatomic) BOOL clearImageBeforeRefresh ``` to ```YES```;