Here's a problem that I frequently encountered in PPro CS4 and had not encountered in CS5 until my current project: I dynamically link many compositions in AE (also CS5) to my Project in PPro. I save the project in PPro, close PPro, shut down for the night and the next morning when I reboot and open PPro, the placeholders for the dynamic links are there, but the links have that ugly "Media Offline" red screen that means I have to go to each link, delete it (there's no way in PPro to relink as a proxy as in AE) and reimport it into the PPro project, where it works fine...until the next time.
Everything is on the same drive in one big master folder. I am importing individual compositions from a larger .aep file that resides in an After Effects directory in the main project folder. Machine is a Quad core i7, Win7, 16GB RAM, and dual SSDs with no RAID.
Is this a feature or a bug?
I have had the same problem lately. You can re-link it. Right click on the file in the project manager an pick re-link.
It works for a couple times and then it will eventually break again.
My project files are on the same drive so I don't know what could be causing the issue.