Alternates that redirect or fail
IssueHigh priority
Pages with an alternate that redirects, returns an error or does not answer.
Why it matters
Search engines expect alternates to be pages they can show; one that redirects or fails is ignored.
How to fix it
Name each alternate by the address it finally answers at, and fix or remove the ones that fail.
Skitter runs this check on every crawl, and lists each page it finds with the evidence: the header, the tag or the link that gave it away.