Ticket #345: Edge cases in fActiveRecord::changed()

So if an active record had a blank string for an old value, and then was submitted through a form, fRequest returns NULL if there was no value, so now technically they have changed, but since the field was a varchar not null default '', then when it's stored it's back to a blank string, and thus, will not have changed. Could you either pass in an optional $schema into fActiveRecord::changed() and use default values and not null to determine more accurately whether the value has changed, or add an optional boolean to omit comparisons of this level?