Older entries:

• Can't Remove Bad Links? Last Resort, 404 The Web Page | September 7, 2012
• Disqus WordPress Plugin Confusing GoogleBot | September 6, 2012
• Want To Disavow Links In Google Now? 404 The Target Page | July 13, 2012
• Google Now Treats 404 & 410 Status Codes The Same | May 31, 2012
• Google: Spam Links To 404 Pages Won't Hurt You | January 31, 2012
• 404 Errors By Third-Parties Shown In Google Webmaster Tools | November 22, 2011
• Mistakenly 404 A Page & Google Deindexed It? Google Hope To Reinclude It Quicker | February 3, 2011
• Google Mocks How Yahoo Removes Images From Flickr | November 5, 2010
• Should You 301 Redirect Catch All Pages To Home Page? | August 16, 2010
• Yahoo Search 404 Handling Poor Again? | June 22, 2010
• Google Says Soft 404s Don't Result In Penalty, But Do They Hurt? | June 22, 2010
• Google's Soft 404 Errors Also Include 5xx Errors | June 17, 2010
• 404-Like Content In Google Webmaster Tools: Soft 404s | June 7, 2010
• Google Webmaster Tools "Not Found" Errors Won't Hurt Your Rankings | June 2, 2010
• Not Only Are 410 Response Codes More Permanent, They Are Faster | April 30, 2010
• Google: Large Number of 404s Doesn't Hurt You | March 29, 2010
• Remove Pages From Google ~Forever Using a 410 Status Code | January 27, 2010
• Google Now Treats 410 Status Code As "More Permanent" Than 404 Status Code | October 27, 2009
• Google Enhanced 404 Feature Gone? | July 8, 2009
• 404 Pages Should Not Return 200 Status Codes | March 20, 2009
• Google Search Engine Sports Broken Link, Few Notice | October 27, 2008
• Out of Stock? Don't Delete or Redirect That Web Page! | September 5, 2008
• Google Fixes 404 Widget Scripting Errors | August 21, 2008
• Google Enhances "404 Not Found" Experience, Creates Broken Page Experience Instead | August 20, 2008
• 404 or 301 Your Old Pages? Which is Best For SEO? | August 14, 2008
• What to Do When You Have a 404 Error | June 26, 2008
• Make Sure to Return the Right Response Code on 404 Pages | April 14, 2008
• del.icio.us Blocks Search Engine Spiders | February 18, 2008
• Google's Toolbar Reportedly Overwriting 404 Pages Across The Web | February 12, 2008
• Should Google Spice Up Their "404 Not Found" Pages? | January 30, 2008
• Ask.com Fixes Crawler Issue With Badly-Formed URLs | January 4, 2008
• Ask.com Crawler Inserting Url-Encoded Spaces in URLs Causing 404 Errors? | December 31, 2007
• Do Search Engines Prefer Default or Custom 404 Error Pages? | November 28, 2007
• Are 404 Errors Bad for SEO? | October 29, 2007
• Does Google Still Crawl 404 Not Found Pages? | March 9, 2007