Date picker is often going off the top of the page

(Bug, Closed -> Fixed, Priority: Critical, Test Status: No automated tests yet , Reported By Justin du Coeur, )
User Interface
Summary: If a Date is near the top of a Model, when you go to edit it, the picker is often running off the top.
Did something break in the big round of upgrades? I really thought this used to work, but it now doesn't seem to.