WEB1042 - The page is not well-formed
Each page should use well-formed HTML or XHTML.
The SEO Checker will not analyze a page unless it is well-formed. Consider correcting the page source before running the SEO Checker again.
The SEO Checker relies on the structure of well-formed HTML or XHTML to accurately perform its checks. If a page is not well-formed, the SEO Checker will return a large number of false-positive results.
For more information about well-formed markup, see Edit XML files.