InfoPath Dev

I have a multiple selection list box on a form. I have a rule that sets the value of another field. There is not condition. Just any time item is checked or unchecked the value of the other field should change. This works when checking an item in the list box but not when unchecking the item in the list box. My question is - do rules not fire for a multiple selection list box when unchecking an item?

Are you seeing this in the browser or the filler?

Rules only fire when the value changes. Maybe the browser is "intuiting" it wrong. Go to the property for the checkbox and click on the browser tab and choose always.

If that doesn't work, check the default values for your checkbox.