Hi all, I have been using iMovie for a while now, while it took a little while to export (render) in the past, now a 3minute clip takes an hour and a 6minute clip takes 2 hours! I thought it should be 1.5 - 2x longer not 20x longer..... All other operations seem as fast as usual even in iMovie. Is there some sort of cache i need to empty? My CPU is running 2 cores at 80-90% and 2 cores at 30% iMac 3.06Ghz i3 16Gb Ram ATI Radeon HD 4670 OSX 10.6.8 iMovie 11 - 9.0.4 (1634) 500Gb HD - 240Gb free I have repaired disk permissions, could this have changed something? Please help, I'd hate to render a 20 minute video right now. Andy.