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					Originally Posted by  Suffolk Punch
					 
				 
				Have just upgraded my windows 7 virtualbox vm to windows 10 (v. 1909). 
 
The issue: The latest 64- and 32-bit versions of Calibre (4.8) both display epub books in the e-reader with text upside-down and left-right flipped (I think). I have attached a snap of what it looks like (Calibre-issue.PNG). 
 
Previously, Calibre 4.8 running in the Windows 7 VM  had no such problem. 
 
VirtualBox is v. 6.1 (running in Linux Mint 18.3) and has the 6.1 guest additions CD installed. 
 
Has anyone seen this sort of thing? 
 
Martin 
			
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 Someone else posted that he was running Calibre with Linux in a VM under Windows 10. His solution was to run Calibre under Windows 10 and dump the VM. Creating a VM just to run Calibre is a really bad idea.