> "Examples of weak references in Cocoa include, but are not restricted to, 
> table data sources, outline view items, notification observers, and 
> miscellaneous targets and delegates.  [. . .] Likewise, when a delegate 
> object is deallocated, you need to remove the delegate link by sending a 
> setDelegate: message with a nil argument to the other object."

Noted, thanks.  This seems like an oft-overlooked problem when lots of
controls have their delegates set in the XIB; there's no easy way to
look at the code and make sure that there's a delegate-clearing
statement for each one.
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