This problem started after we installed the latest update.  We have a few p/n's where we don't release the line with the p/n, but we say YES to releasing the spec lines that appear on the SO.  This allows our NAFTA statement, for example, to print w/o showing it has an item that shipped.  Now, if we don't release the first line, the specs will appear and print on the Packing List but not on the invoice.  This is a real problem because you have to print either the NAFTA statement or the Commercial Invoice statement on any foreign shipments.  
 
Any clue on this anybody?