So text drag&drop onto the tabs works great now, but as I mentioned in my commit, I can't get the AISendingTextView to resize properly when text is dropped on the tab (processed in the routine appendToTextEntryView in AIMessageViewController.m). It's not a line ending issue, as cutting and pasting back in the same text works as expected. I post the same notification that, say, clearTextView does, and that doesn't do it. I think it might need an [NSTextView edited: range: changeInLength:] call, but it throws an exception that doesn't make any sense. Someone, anyone, figure it out...