A user found a bug in Adobe Pro 10.1.6.
We have both Adobe Reader and Pro installed on Server 2008.
A document stamped with dynamic signature: "APPROVED" do not show in Adobe Pro when opening.
If the zoom level is being change then the stamp do show.
Same document show the dynamic stamps in Adobe Reader.
I reported the bug through this form https://www.adobe.com/cfusion/mmform/index.cfm?name=wishform
Is there a workaround until a fix is comitted ?