ZC 1.3.8a

We've run into an issue where ZC seems to be rounding discounts when we think they should not.

Example where an item is set to give a (20% discount when purchasing 10 or more):

50 widgets @ reg price of $1.24 = $.992 ea. after discount
Total with discount = $49.60

Yet Zen Cart Calculates this to a total of $49.50
It appears that the discount applied to the per-item-price is rounded immediately to .99 rather than .992


Anyone know how to fix this????