Premiere CS3 clearing preview files
 

I'm on a macbook pro, and have plenty of hard drive space. The adobe master collection CS3 was installed minutes after a clean install of Leopard.

I'm working on a project and had no problems with it for a couple of days. All of a sudden, after everytime I reboot Premiere, all of the rendered preview files are no longer available. The odd thing is that the preview files still exist on my hard drive, and the scratch disk location is correct.

I updated Premiere to 3.1.1 and still have the same problem

I've found a workaround, I have to select the entire project and move it ahead a second, then it allows me to re-render the entire project. Then I can work on the project as much as I want to with the preview files working correctly, but once i restart the program they are gone.

Extremely annoying, are there any fixes for this?