InfoPath Dev

 InfoPath 2013 update in KB3114946.  Requires Office 2013 SP1 first.

 For the benefit of any other victi...  um... user of InfoPath who has read this far, the specific fix appears to be in the InfoPath 2013 update in KB3114946.  Requires Office 2013 SP1 first. https://support.microsoft.com/en-us/help/3114946/may-3-2016-update-for-infopath-2013-kb3114946  

 No problem.  It's good to know someone's reading.  You have no way of knowing my level based on one question, so the "obvious" can often be exactly what's needed.  And I probably was a little "snippier" than merited.  (Caught me right after getting smacked by someone else, somewhere else, ...

 Yeah - that sort of occurred to me already.  I was looking to see if there was an explanation of WHAT the underlying cause was.

 Could you share what the patch was?  Office 2016? InfoPath 2013? Both?

Probably not necessary, but thanks.  I've made a lot of use of selectively hidden/displayed sections before (state of answers, steps in a workflow, who's looking at the form, etc.), but that was always in web forms on a full blown SharePoint site.  It just never occurred to me in this "dumbed down" context.  I ...

 Fiendishly clever, that!   I shall have to give it a go...

I have an InfoPath 2013 form which I make available to users through a SharePoint Foundation 2013 page.  Because it is SP Foundation, there is no InfoPath Form Service available and no Web View, so I use the InfoPath "Submit" to email the form to a predefined list of users.  Everyone who fills out the form has at least ...