I know there was some previous discussion regarding the days-to-pay calculation and whether it was accurate.  I had been meaning to pay attention when I was posting a receipt (not my normal duty) and finally got the chance today.  We wrote off an invoice of a customer who normally pays pretty close to terms (current days-to-pay shows 40 days).  The invoice written off was 349 days old and their days-to-pay did not change at all afterwards.  Seems to me that it should have budged at least a little bit.  As an update suggestion, perhaps add a separate program item that will recalculate days-to-pay for a customer similar to inventory book value.
 
Sean
Leybold Optics

We would also like to see this fixed.  We use the days to pay quite frequently.