How times change.
I remember a group of my acquaintance being royally reamed because its web application would, under some circumstances, disable the browser Back button or not work properly with it.
Horrendous! Inappropriate! Bad software engineering! Off with their heads!
So now I’m reading all the cool people blogging from CIL about how everything should be done in AJAX–oh, and by the way, you’ll tend to break the Back button.
But that’s OK, because AJAX is 2.0 and cool and the wave of the future.