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Hi! Looks like Rand beat us to this one, but just a few quick things to add for ya. I did a quick crawl of the site in Screaming Frog. Looks like most of the duplicates titles are due to two things; Your tag pages all of the same name. There must be away to set your titles for tag pages to reflect the tag name. Its counting every page twice - one with the slash at the end (ie: /contact-us/) and without (ie: /contact-us) (note: seems like the same for your descriptions and pages headers - this could be the "duplicate page content error") So, fix your tag pages and see about why the pages are loading with a slash and without. The 404s are there, but they look like some sort of squarspace issue with how images are cached or something - not actual pages on the site. Looks like one of your links to wikipedia has a stray character in it causing it to be a broken link. I would verify/cross check these errors in Google Webmaster Tools and then Rand's suggestion is perfect for the 404s. Hope between all of that it helps! -Dan