it is ridiculous that the QB support can not tell you how to fix this.  QB forced the R10_19 update on me yesterday and we instantly saw the Create Auto PO button was missing.  I called QB support and after an hour of going through preferences and settings they informed me that engineering is working on this and that all they can do now is add me to a list.  I updated to R10_25 because of the last post in this forum and the button is back.  That seems like a pretty simple thing for QB support to inform you of when you are having this problem.  This is frustrating!!