[themes] How to troubleshoot themes?

[Jody Cleveland]

Hello,

I'm having a problem with a theme I'm using, and I'm at a loss as to how
to troubleshoot the problem. The problem is, for menus I create, they
should be wrapped like this:
<ul>
  <li></li>
  <li></li>
</ul>

But, my theme wraps them like this:
<li></li>

I have absolutely no idea why it would leave out the <ul> tags. So,
needless to say, it breaks validation and doesn't honor the stylesheet.

Any ideas on how I can troubleshoot this problem?

- jody