Editor compatibility with CS4?
 

I've noticed that Premiere CS4 completely changes editing paradigm. It's now more like AVID or FCP, which may be good, but it's a real nuisance for long time Premiere users. There is now a concept of source-target switchboard like in AVID/FCP (notice the big Vs and As on timeline track controls), whereas in older Premiere you just selected if you want to insert/overwrite A, V, or AV. This new paradigm introduces need of sync locks, which is a tremendously useful thing, but it adds complexity to simple editing jobs.

I was used to use keyboard shortcuts for switching next/previous target tracks. That is now gone, and we have something like in FCP/Avid, toggling separate tracks on or off. That's one more technique to learn and one more habit to break.

Something like this happened between PPRO2 and CS3, which removed TAB toggling between source and record windows. I think Adobe shouldn't deliberately break longtime user habits like this.

Hey man lets face it. when the first premiere pro came out it was pretty promising but its developed into a big turd. any change has to be good change. dont like it? just use the old version!

For all of us who actually use the application to make a living, these are profound changes and companies should not break basic habits. If avid made such a change, no one would upgrade.