On SE's new blog main page some tag names are linked to broken links. Upon clicking on the 'serverfault.com' and 'superuser.com' tags located in the right sidebar panel under 'TAGS' section (screenshot below)
displays the following error message:
Sorry, we can't find that page that you're looking for.
If you've just run into a broken link, please report it at our feedback site.
As per Shadow Wizard's comment:
Yep, for some odd reason the dot was replaced with "-" character, breaking the URL. This link works.
Apart from main page 'TAGS' section, I have also noticed the broken links for serverfault.com' and 'superuser.com in the 'Other Tags' section. For example, here is a link to 'Stack Overflow blog' page, see 'Other Tags' located in the right sidebar panel of the page.