TableColumn Enabled binding on 10.4/10.5

FROM : Knut Lorenzen
DATE : Thu Mar 06 20:52:07 2008

My Table Column Bindings to an NSArrayController are set like this:

Binding: Value
Controller Key: arrangedObjects
Model Key Path: theName (this is a String)

Binding: Enabled
Controller Key: arrangedObjects
Model Key Path: enabled (this is a Boolean)

All this works perfectly well on 10.5, i.e. the rows in the TableView 
are greyed out if "enabled" is false.
However, on 10.4 all rows appear as usual, not greyed out. A "false"-
row *does* grey out (inversely, so to speak) if it is selected, though.

XCode3/IB3 used here. What am I missing?

Thanks,

Knut