I've been searching a problem re PPro 1.5, and found similar in this forum. I registered & posted more info re playback on extern monitor, what I've got so far;
then realized that I hadn't introduced myself!!

I've got a bit of 3/4 inch tv production/editing experience and am dipping my toe into (low capital investment) NLE. So far I really like Premiere Pro, but I haven't decided whether or not this playback issue is a deal breaker.