I work for a tour operator specialising in Japan. I sent a powerpoint file to my colleagues in Tokyo for double checking and they wrote back to say there were many duplicate words that needed to be deleted. My original version did not have these words.
I'm using Office 2016 and they're using Office 2013. Please see the image below, which shows a comparison between my version on the left and theirs on the right with the duplicate words circled.
This has never happened before and we've been exchanging files in this way for many years through various versions of Office.
Any ideas?
http://imgur.com/a/d1nuG