We enter a SO with 4 items, each having a 2nd line of description.
We release all 8 lines and list the invoice to the screen.    
 
But we decide we need to go back in the SO and type  "LABOR ONLY" , so we go back and type it on the 9th line of the SO.  There is no inventory item associated with this line.  We make sure that line 9 is released.  
 
We list it again, but the 9th does show up on the invoice.  ?!?!  
 
We go back into SO-A and sure enough, it is there, and released. It just doesnt show up on the invoice.
 
I had to go in and insert a line above the 1st item and type LABOR ONLY to get it to print on the invoice.  (however inserting a line after the  last item doesnt work)
 
We could do this before the update, We can't now.  We need to do this, so I think it is a bug and not an improvement.  Unless  the intention is to make us go thru SO-E to release the little extras.
 
This has happened to us 3X since the update. I think it could be related to a post from last week in MFG about PO/SO/RMA