Zoltan,

Shared Dynamic is a very powerful and very dangerous serialization option.
Please make certain that the person who made the decision to use that
understands the implications.

This serialization option will try to back up a file 4 times and then save
the file on the first try during which the file contents didn't change.  The
danger comes with files that continually change and potentially with
applications that require multiple files to be synchronized, like databases.
Net result - you may or may not be able to accurately restore those
applications.

The normal and accepted setting is Shared Static, as you had with the
"problem" client.  So you were fixing the one client that was configured
properly when you should fix all the others.  This will give an error if the
file changes on all four attempts so that a human can decide what to do with
the application backup.

If your university IT personnel understand the implications of Shared
Dynamic and choose to live with the restore consequences, then you can take
the rest of the day off.  Otherwise, you may have a short weekend. ;-)

Bill Smoldt
STORServer, Inc.