Funny parsing issue...

<style>
P { border: red solid 1px; }
P P { border: green solid 1px;}
</style>
<p>A paragraph
<object>
<p>innerP
</object>


Issue: P nested inside another P is incorrect.

I thought I read somewhere on this mailing list that per HTML5 we're supposed to ignore/treat-as-opaque fallback content from an Object. Can someone point out where that might be specified?