I've never seen Sigil turn a opening/closing tag into an entity on well-formed (x)html. I'm not saying yours isn't/wasn't well-formed ... I'm just saying that out of the 100 of thousands of lines of (x)html code I've run into/through Sigil ... every single instance of > or < has been my fault. 100%. Either I purposely entered the entities because I wanted them there, or I screwed up the code and Sigil failed to correctly guess what I did wrong.
I've tried importing, pasting, opening that line of html you posted and I just can't get Sigil to screw it up. The only way I can get Sigil to reproduce your problem is by forgetting one of the attribute quotes.
Last edited by DiapDealer; 09-12-2012 at 08:41 PM.