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Custom pasteboard types?

I've got a view that's both a drag source and drag destination. Dragging to and from other objects (where I've used delivered pasteboard types like PBTIFFPboardType) works fine, dragging from one of these views to another one of them, however, doesn't work.

What I've tried to do is to declare a custom Pasteboard type, which I can use to copy all attributes between two views of the same kind. Using the type seems to work - I'm able to put objects on the pasteboard using it, and when I retrieve the list of types from the pasteboard, the type shows up as available.

But no matter what I do, the object I put on the pasteboard doesn't come through. It's an NSDictionary, and it's not nil, but I get a nil object on the other end of the drag. This happens if I use setPropertyList:forType: setData:forType: (archiving the data with an NSKeyedArchiver) or setString:forType.

Can anyone think of what I might be doing wrong? Is it acceptable to declare custom pasteboard types like this?

Thanks,
Jeff
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