Make sure everyone is fully patched to 7.0.4. There was a bug in CS5 7.0.0 which allowed multiple users to open a file.
Are we talking about CS3 file opened in CS5, or CS5 files? And what do you mean marked as read only?
Well, that's embarrassing. Really, it was that easy.
Thanks for your help, Bob. I appreciate it and now I won't be insane.
Have a great day.
Peter - it was just CS5 files opened in CS5. I noticed the change when we upgraded from CS3, which is now fixed with an update. It literally said "file name" Read-Only. I could work on it, move things around but I couldn't save, I could do a Save As but that wouldn't save whatever the person working on the file saved. Really big huge hassle. Especially without caffeine.
Thanks for the reply. Have a great day.