My footage is in Pro Res 422 (1920x1080). My sequence is Pro Res 422 (1920x1080) with Unlimited RT. Every time i make a cut i have the render out the orange or else i get a slow playback. What am I doing wrong?
Also check that if the media is interlaced or progressive and make the same change to the timeline. If the ProRes-files originate from an odd source - double check their frame rate as well. I've seen 24.xx FPS when dealing with 25 fps footage for example. This is something FCP won't like.