I'm using FCP 7, and at the beginning of my timeline I've got two simple slides of text over a solid color background. For some reason, I have to render this text to get it to play back, but after rendering, it no longer plays back correctly. The second text slide comes on long before it should, and when the playhead arrives at the second slide, playback just goes black. I've deleted render files, rebooted FCP, reset scratch discs and so forth. I'm editing XDCAM footage, and my sequence settings match the source footage.
Here's an easy thing to try:
In FCP's Render Manager, delete all of the project's existing render files, which you've already done. But here's the next step: duplicate the existing edit timeline, and change the duplicate's codec to ProRes 422 in the Sequence Settings. Now render away.
The results should be more acceptable; if they aren't, consider trashing your preferences.
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA