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					Originally Posted by  jhowell
					 
				 
				I did a test using the Kindle Previewer 3 beta and found that having a media query with device-aspect-ratio, device-height, or device-width prevented the book from supporting enhanced typesetting. I don't know whether or not the same would hold true of a book sent through KDP. This could be a factor if you (or your customers) care about enhanced typesetting. 
			
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 The Lord High Zon Giveth, and the Lord High Zon taketh away...
All humor aside--you saw this post-Previewer, right?  The beta?  And we don't know what might happen in the PW (Publishing Workflow).
Warning--apparently, more "hands-on" work is indeed being done at the PW.  So, now--yeah, wait for it--we can't be 100% positive what our books will look like (fonts, enhanced typesetting, etc.) 
until the accursed things are live.  This isn't surmisal.  
It's confirmed.  
Hitch