The dbus-devel package contains a dangling symlink /usr/lib/libdbus-glib.so, pointing to a file which is provided only by the dbus-glib package. But dbus-devel doesn't require dbus-glib. This causes bug #191761, and the naïve option of just adding BuildRequires: dbus-glib doesn't seem appropriate.
Ping. A mass rebuild is scheduled for tomorrow, July 11th. Please try to have your package fixed by then.
This really is an EasyFix, simply add to -devel subpkg: Requires: %{name}-glib
Not an FC6 issue
That symlink is in dbus-glib-devel nowadays.