Dan, although I love me some MOZ the crawl diagnostics kinda suck... all they do is report errors but they don't give any insight on where the bad link is originated... it merely shows the page which is 404ed, which is a BIG FAT WASTE OF TIME.
You guys should know that we need to know WHICH PAGE THE BAD LINK IS ON, and furthermore WHAT LINE OF CODE HAS THE BAD LINK. Who cares about the broken page!?!?!?!?!?