Hey there,
I am exactly where you were when you mad e this post. Its almost 4 AM, again and Im still getting this stupid out of disc space error as well as multiple crash on FCP 5.1.4 I just spent 4500 bucks on a new Quad core xeon MAC Pro and j=have had nothing but head aches since! Did you ever figure out what was causing those issues with you? Please share the info, because I am about to tie the MAC to my feet and jump of of a goddamn bridge!
Thanks
Thomas