Ask HN: Comment rendering problems on HN Using latest Safari?

About an hour ago, I posted the following comment: https://news.ycombinator.com/item?id=7453669

On my Mac running the latest Mavericks beta, this is what I'm seeing: That link was the most interesting thing I've read on HN all day. Thank you!

If I check the source code for the page, I see the full comment: <span class="comment"><font color=#000000>That link was the most interesting thing I&#x27;ve read on HN all day. Thank you!<p>My favorite quote: &quot;As a historical remark, it&#x27;s interesting that the possibility of thinking machines isn&#x27;t something that occurred to people gradually, after they&#x27;d already been using computers for decades. Instead it occurred to them immediately, the minute they started talking about computers themselves. People like Leibniz and Babbage and Lovelace and Turing and von Neumann understood from the beginning that a computer wouldn&#x27;t just be another steam engine or toaster -- that, because of the property of universality (whether or not they called it that), it&#x27;s difficult even to talk about computers without also talking about ourselves.&quot;</font></span>

Testing with Firefox and Chrome renders the comment correctly... I'm no html expert, but it would appear that the <p> tag in the middle of the comment is causing the span to be truncated. Is this a bug in Safari or HN?