At the risk of appearing to be a complete dick - the Footprint problem was actually a parameter setting. Dooooooooh! If you want deltas consistent with the old platform ensure the "Breakdown by" is set to Bid vs Ask and NOT Up vs Down Ticks in your Footprint charts.
I am recanting my earlier statements about not recommending the new platform for delta information. It now gets my "blue ribbon seal of approval" (as if any gives a shit - hah).
I'll be fully transitioned over to the I/RT platform in the next few days and couldn't be more excited.
bolter