>She called the company, and they told her that U-D meant there was
>absolutely no milk in the product, but that it was manufactured on
>equipment which also carried products which contained milk. All
>that I have read indicates that these items would be labeled U-DE,
>not U-D.

I believe that in this case they have the option of labelling either
DE or D.  The DE label is rarely used.  It may be the case that OU
(the U in a circle) doesn't use the DE at all, and requires all such
products to be labelled dairy.  OK (K in a circle) does use it (see
dark chocolate toblerone, for example).

--Robyn