Attached please see the response I received from ou.org.  I'm not sure this clears up any confusion, but you can decide for yourself.
 
Sandy


----- Forwarded Message ----
From: Webbe Rebbe <[log in to unmask]>
To: [log in to unmask]
Sent: Monday, October 23, 2006 1:57:13 PM
Subject: KC-4882 RE:Duncan Hines Mix


 Rosh Chodesh Mar Cheshvan 5767
October 23rd, 2006
Parshat Noach
Send comments/questions to: [log in to unmask]
KC-4882 Duncan Hines Mix                                                
Dear Ms. Sheeley,
Thank you for checking with the OU regarding your Kashruth question.
The Duncan Hines mixes are correctly marked. 
There is a possibility of parts per millions of dairy floating in the air and ‘contaminating’ the product.
The ‘contamination’ would only affect consumers with extremely severe allergies who can detect even the most trace amounts of the substance that they are reacting to.  A product that is labeled OU (and thereby certified kosher parve) is halachically (by Jewish Law) parve. The parts per million does not affect the status of a product, because parts per million are negligible and have no halachic significance.
As an example, a factory might produce dairy and parve products on two separate production lines.  Nonetheless, air-born particles of milk or whey powder might float onto the parve production line.  Though a person might suffer an allergic reaction, the product is still halachically parve.
Companies have been especially cautious in the past few years to publicize this information as the public’s knowledge of allergens has grown. 
Please don’t hesitate to contact us again should you have any further questions. 
With our best wishes for a pleasant fall season, we remain,
Sincerely,


The Web (be) Rebbe 
For more information about Kosher, please visit our website, http://oukosher.org. 
Listen to the world's leading experts in Kosher share their knowledge on Kosher Tidbits, now playing on OU Radio.
-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Friday, October 20, 2006 10:42 AM
Subject: Duncan Hines Cake Mixes
I recently found some Duncan Hines cake mixes which have switched back to 
kosher parve labeling.  I contacted the company and they told me that the 
cake mixes are a new recipe which does not contain dairy, but that they are 
processed on shared lines and would not be safe for my son who has dairy 
allergies.  My question is:  Do you have additional information on this?  
And is the kosher labeling on the products correct?  Thank you for any help 
you can give me. 
Sandra Sheeley