For you Firefox users, word is that it is incompatible with AppleScript,
AppleScript is broken in Firefox 3:
Firefox 3 is in Release Candidate 1 stage. But it shouldn’t go out yet. Yes, there are improvements but I think there’s one big regression: its AppleScript is broken.
There’s two pieces of data that’s critical for several apps to get from Firefox: the current URL and the current Title. The title portion is broken in Firefox 3. That’s a regression from Firefox 2. Except, it isn’t officially, since Firefox never officially supported AppleScript. There were just some good programmers who added it in.
So what happens when you request the title? It returns random garbage data. That’s pretty bad.
So who depends on AppleScript working for Firefox? WebnoteHappy for one. Adium is another app that needs it. There’s probably a lot of private scripts out there that require it too. ...
Read the complete article, there are ways for you to help make sure that the dev team takes a serious look at fixing this.