QUOTE(pandy @ Apr 26 2009, 05:25 AM)

Have your settings been magically changed? Do you have to change the view for each thread or was it just the one? I thought there was a setting in your Profile, but I don't see it now either.
All working now! Just changing that setting inside one thread seems to have switched everything back to the 'straight' view. A tree view can be useful, but I often use the "Quick reply" box, which appears under the top post, so even a chain of responses isn't viewable in a straight line with "tree"...