Well, not wanting to contradict vbaInet, but the triple state was there all along but it just has to do with how different versions interact with it. In 2003 your database looks fine UNLESS you uncheck the box Use Windows Themed Controls and then the checkboxes look green (null) whereas if I use the Windows Themed Controls, then it really just shows the nulls as no as well. Sometimes different versions tighten up on the way things are handled and 2007 does that for several things.