I recently bought the Lion flash drive and clean installed it onto my computer from Leopard (I skipped snow leopard and this is why I had to clean install Lion). I then installed FCP7 (ripped) and it worked fine for a few days. I started to encode some videos to apple pro rez which took up a huge amount of space on my hard drive and i got pop ups saying my start up disc was full. Then FCP wouldnt open. It would load with the start up screen and all but would never actually open. I put a bunch of files (including the video files) onto my external hard drive and I now have 292gb out of 499gb available on my lap top.. so the start up disc is nowhere near full any longer. FCP STILL WONT OPEN. I have been investigating this problem on google and people have had this same problem. Some people have just re-installed FCP over and over so it would keep working. But I don't want to have to do this. I have repaired permissions. Could it have to do with the clean install of Lion?