Question

I was wondering if there would be any problems if I added a list inside a H1 heading:

<h1>
 <ul>
  <li><a href="...">some link</a></li>
  <li><a href="...">another link</a></li>
  <li>current page</li>
 </ul>
</h1>

the list is a “breadcrumb” type navigation.

Or is it better to insert it inside the list?

<ul>
 <li><a href="...">some link</a></li>
 <li><a href="...">another link</a></li>
 <li><h1>current page</h1></li>
</ul>

Answer 1

It’s not valid to have a ul inside a h1, the best way of checking is to use http://validator.w3.org/ to check your structure, that way the doctype you are using will be considered. (but it’s still not valid!)