samba - Oct 2003 - Windows machines caching file state on samba shares?

Hi folks.

Using Samba 2.2.7a, we're seeing a weirdness where one Windows PC will
update some file on a share, and another one will, when accessing the
same file later, see an older version.  Right-clicking on the file &
selecting Properties will update the file state.

Is there anyway to force reads to synchronize whatever state is being
held to avoid this?

--JB