Originally Posted by  theducks
					 
				 
				Do not  Depend on something that appears to work in Sigil   
Sigil will tolerate more  errors (IMHO allowing any non-spec feature is an error) than the Spec allows.
 
Then you still need to check your work on Devices because DEVICES do not always support all of the EPUB SPEC.
 
to wit  a 50% <hr /> appears  as intended in Sigil/ To get it to appear the same with ADE (MRSDK), you need to  fake the  center by using a margin-left: 25%
   Do spend some time reading the stickies at the top of formats forums. It will save a lot of hair pulling/   later.  
			
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