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Hi there, In order to reduce the huge amount of duplicate content and titles for a cliënt, we have disallowed all  spiders for some areas of the site in August via the robots.txt-file. This was followed by a huge decrease in errors in our SEOmoz crawl report, which, of course, made us satisfied. In the meanwhile, we haven't changed anything in the back-end, robots.txt-file, FTP, website or anything. But our crawl report came in this November and all of a sudden all the errors where back. We've checked the errors and noticed URLs that are definitly disallowed. The disallowment of these URLs is also verified by our Google Webmaster Tools, other robots.txt-checkers and when we search for a disallowed URL in Google, it says that it's blocked for spiders. Where did these errors came from? Was it the SEOmoz spider that broke our disallowment or something? You can see the drop and the increase in errors in the attached image. Thanks in advance. [](<a href=)" target="_blank">a> [](<a href=)" target="_blank">a> LAAFj.jpg