Bug with {maketoc}?
I think there's a bug with the {maketoc} module. It creates an anchor (<a name="xxxx"...>) that encapsulates the heading element. This is invalid — an inline element cannot contain a block element.
For example, look at the source of UserPagericks99. This line is invalid:
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<a id='id939080'><h1>Things You <i>Won't</i> Find in the Tiki Docs</h1></a>
It should be:
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<a id='id939080'></a><h1>Things You <i>Won't</i> Find in the Tiki Docs</h1>