On an updated Dapper install, I can observe the same behavior. Setting the timezone to Europe/Belgrade does not stick. The next time I open the Adjust Date & Time option in the clock on the desktop, the TimeZone is set to Europe/Sarajevo.
Confirming. ** Changed in: Ubuntu Status: Unconfirmed => Confirmed -- Wrong timezone location for ex-YU Europe countries in Time & Date settings https://launchpad.net/bugs/16285 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs