So this is the second time this has happened. I start editing a file, cutting up clips, even exporting a few files and everything looks good. I take a short break, five maybe ten minutes, I come back and I play the source file and there's no audio. I look just below the timeline and it says "audio conforming." Ok, so I wait a couple of minutes until it's done. Well now the audio on the original file is out of synch. It skips around. I've tried rebooting and starting the project over, but it's still messed up. Any ideas?
Delete the cache files, then reopen the project so PP can rebuild them.