Hi All,
I had this issue with PPro 6. I run a Mac 10.6.8.
I generally use a shared network drive to hold all of my raw footage and media.
Since transferring my media to a local drive in my Mac, I have not encountered this issue.
I had to re-link all of the media in my project, but luckily it was all held in the same folder, so it was relatively easy.
Hope this helps.
-J