On the Careers page (careers.stackoverflow.com) there's a section "Featured Company" in the right column.
At the very bottom of this section, the text "n jobs available" links to careers.stackoverflow.com/CompanyName, which leads to nowhere. It should probably link to careers.stackoverflow.com/jobs/employer/CompanyName.
The same link is also broken on other Careers subpages, e.g. when selecting a location (for example: careers.stackoverflow.com/jobs/location/berlin) the "n jobs available" link in the "Featured Company" section leads to careers.stackoverflow.com/jobs/location/CompanyName (resulting in a "location unknown" warning.) Similar problem on tag pages.