WebKit with patch for 26816 doesn't support indenting a list item without LI. e.g. <ol>hello</ol> results in <ol><blockquote class="webkit-indent-blockquote" style="margin: 0 0 0 40px; border: none; padding: 0px;">hello</blockquote></ol>
I've been ignoring this case because it's pathological. Nothing should ever produce such markup anyway, so why does it matter how it's handled? (Of course handling has to be well-defined, but it doesn't matter what it *is*.)