In the box below the HTML Inserts:Header there is a line of text that appears (<a name="Top"></a>)
where the default comment says this should be blank. This shows up as an error in the W3C Validation.
I removed it from a test site and there was no issue with it so I am assuming that this is a typo that relates to the latest version update. I am using Atahualpa 3.7.3