Topic: Rails Work broken?

I've been trying to use the site the last few days to look for work in the Denver area and, while numerous jobs are returned in the search, I think only 1 of them actually resulted in a page other than a 404 error.

I see that the newer jobs all work as expected (i.e. page with additional information about the job loads when the link is clicked) so is this something with older jobs no longer being available but still in the system which is causing the 404 errors to be thrown?