Strange behavior using view-based NSOutline (Sourcelist)

Question

I have a (new in Lion) view-based NSOutlineView as Sidebar SourceList in my app using CoreData + NSTreeController + Bindings + NSOutlineView and an Object as NSOutlineViewDelega

Answer 1

You may also have a look at the answer of this question: NSOulineView header cell font The automatic style unselect-reselect dance worked for me.