Well, I too have used QuicKeys "since day one" and unlike the other posters (below) I have absolutely -NO- problems with it. I consider myself a "power-user" with some fairly intricate and multi-step macros, along with a 60 or so fairly simple ones. The only time I've seen QK "lock up" has been due to a change in the circumstances when running a macro (such as a changed menu, window title or so on) or when I screwed up the macro myself.

I've been running all the latest 4.0 betas without any problems, and have, in fact, removed my other text expanders in order to try out the new option inside QK4.

So, while some folks seem to have trouble with it (and historically, that has always been the case: it's quite powerful software) I personally have no problems at all running it under 10.5.7 on an Intel Mac.

Just wanted to balance things out.