Warnings:
The “navigation” role is unnecessary for element “nav”.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
Errors:
Bad value “/author/Miguel Grinberg” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
Bad value “/category/Product Reviews” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
The “center” element is obsolete. Use CSS instead.
No “p” element in scope but a “p” end tag seen.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Attribute “label” not allowed on element “img” at this point.
Bad value “/category/Movie Reviews/feed” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
Bad value “/category/Movie Reviews” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
Bad value “/category/Product Reviews/feed” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
Bad value “/category/Project Management/feed” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
Bad value “/category/Project Management” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
Bad value “/category/Raspberry Pi/feed” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
Bad value “/category/Raspberry Pi” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
Bad value “mailto:webmaster _at_ miguelgrinberg _dot_ com” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
United States US