hmm.. interesting.
To tell you the truth, I've never once used that feature. Its javascript, so im sure its a browser issue of some sort..
works on Mozilla, as far as i can tell
I got to test-drive vBulletin 3.0 yesterday.
It will be a nice upgrade, once they release it.
Everyone who liked threaded view -- it will be back. Everyone who likes this view [linear] -- it will stay. Its based on user preference.
There's a ton of other new features. Too many to list..