If I create a document and put it in the folder then it is smoothly shared to everyone.
BUT, once my co-worker goes to the doc, adjusts anything, and saves it, the doc becomes Read-only for everyone else who tries to do anything with it. It only happens with his computer. No one else's creates this problem.
Our IT people have tried messing with the securities a lot, but to no avail. I think the problem is something specific on his computer.