Can't open jpegs: "Program Error". CS2

I am drawing storyboards for an animated film on my Cintiq using CS2. The other day, I created about 50 drawings. Today, I am doing corrections and CS2 won't open the drawings because of a "program error". This has happened before, but the warning said it was an "Unknown jpeg marker". I created these docs in Photoshop on the same computer: MacBook Pro OS X 10.4.8.

What's the deal?

In the meantime, I can open these drawings in Preview then copy and paste them into a new PS doc, but that is a pain and I shouldn't have to jump through those hoops.

Thanx for any help anyone has to offer!

- T

Something may have corrupted the files. Did you save over a network?

BTW, you would be better off not saving the files as JPEGs since you loose information everytime you open and resave a file. Use TIFF os PSD instead.

can you open files in a new user?

"Unknown jpeg marker" usually points to a corrupted file wrecked by hardware issues.