Msg#: 4233855 posted 10:55 pm on Nov 22, 2010 (gmt 0)
I have just checked my webmasertools account and under HTMl Suggestion Google is reporting that I am having duplicate TITLE TAGS.
http://www.example.com/my-post/ - original post http://www.example.com/my-post/?utm_source=twitterfeed&utm_medium=statusnet - making duplicate content
The strange thing is that when I visited this http://www.example.com/my-post/?utm_source=twitterfeed&utm_medium=statusnet , It showed me the exact copy of the http://www.example.com/my-post/ instead of 404 error which I was expecting.
I don't know why ?utm_source=twitterfeed& is appending to all my article pages and making them duplicate.
Msg#: 4233855 posted 12:16 am on Nov 23, 2010 (gmt 0)
You can resolve the problem easily with a 301 redirect to the URL without the UTM query string - and/or canonical link tag in your pages' <head> section - and/or a robots.txt Disallow rule for those query strings.
However, I don't think the situation is going to cause you any ranking or traffic problems, even as it is. The information in Webmaster Tools is there "for your information" and not as a notice that you have some dire problem - notice that it's listed under HTML "Suggestions". In this case, thousands, maybe millions of websites have the same situation.
Msg#: 4233855 posted 1:16 am on Nov 23, 2010 (gmt 0)
You need to include the asterisk (*) to get complete pattern matching, or else you are not disallowing anything but domain root plus query string [example.com?utm...). I'd probably go with just this much:
With regard to the redirect, it's going to to depend on whether your site uses any query strings at all that you DO want indexed. But even more it's going to depend on your server. The question is better to ask in either our Apache [webmasterworld.com] or Windows IIS [webmasterworld.com] forums.