FWIW -- I tried all 4 appearance options -- just replacing <i> with nothing, and I can't the 6.0 behaviour either
The 4 options all left the </i>
<?xml version="1.0" encoding="utf-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
<p>xxxx used to have the opening tag xxxxxxxxx</i></p>
[Fix Automatically] does, after I read the warning I don't like to use it if it's just one or two things