On Fri, May 28, 2010 at 12:29:44PM +0100, Jim Tambling wrote: > Is there a way to make the 'Time Worked' field mandatory with each > update? > > You have to write your own callback for share/html/Ticket/Update.html to check that the field is not empty on post. see http://wiki.bestpractical.com/ for hints on callbacks.