Quote:
	
	
		
			
				
					Originally Posted by  curio
					 
				 
				I've come up with a kludge of my own to work around the limitation: Whenever I create an optimized version of an eBook for my Nook, I add the original with a suffix of "-orig" (i.e., "foo.pdf" would become "foo.pdf-orig"). 
			
		 | 
	
	
 Hi, curio
This is an interesting work-around. Have you tried moving your Calibre library since you started doing this. I was wondering whether the Calibre-unknown formats, such as 
.pdf-orig, got properly moved with the known formats (epub, zip etc) for any particular book.