I've been doing a lot of research on 301 (permanent) redirects, and use of the rel=canonical tag, and I'm a little concerned my site's not doing a good job, and hence susceptible to duplicate content problems.
Check out this 301-redirect checker: http://www.ragepank.com/redirect-check/ and type in my site's URL: jobstr.com
All 22 of those URLs are returning a 200 (OK) message, when (unless I'm mistaken), only ONE of them should, right? Is this a problem?
But also weird is that of those 22 URLs, nearly all of them just link to "Page Not Found" pages on Jobstr, see: http://jobstr.com/index.htm
If they're going to Page Not Found pages, why don't those redirect checkers return a 404 code???