Fotiman - 2:30 pm on Mar 8, 2012 (gmt 0)

Are fieldsets supposed to be ONLY in forms?

According to HTML 4.01 [w3.org], XHTML 1.0 [w3.org], and HTML 5 [w3.org] a fieldset is not restricted to forms only. With that said, *typical* usage is in a form.

The Infolinks algorithm systematically ignores the contents of the <fieldset> tag to avoid placing highlighted links in forms.

It sounds to me like their algorithm is flawed. If they want to avoid placing highlighted links in forms, then they should ignore the contents of the <form> tag, not <fieldset>.