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Google indexing // - is this a canonical issue?
Supplemental Results and Canonical URI's

WebmasterWorld Senior Member 10+ Year Member

Msg#: 32812 posted 5:22 pm on Jan 16, 2006 (gmt 0)

I have seen instances today where google has cached the same page twice - although it assumes it is different - please see the example:


It always seems to assign either the / page or the // page to the supplemental result index in every instance I have seen it.

Are these pages going to get a duplicate content penalty?

Is this a true canonical issue or am I seeing something else?

Any idea what would cause it? In the instances I have seen there is no coding error (two sites though not my own, the respective owners have checked them as thoroughly as possible). Could it be an external linking error with someone linking to the wrong uri?





5+ Year Member

Msg#: 32812 posted 9:26 pm on Jan 16, 2006 (gmt 0)

Hi Jez,

I've been wondering about this too. This thread may help: [webmasterworld.com...]

Since that discussion, I've seen it happen again on one of our other sites where it never occured before. It's still annoying me and I have no idea why it's happening.

So far, it hasn't caused any problems in the SERPS for those sites, but I haven't noticed these pages with two slashes actually showing up when I do site:domain.com search.

Sorry I'm not much help! It's a mystery to me too. I couldn't find any inbound or internal links that could be causing the problem.


10+ Year Member

Msg#: 32812 posted 5:49 am on Jan 17, 2006 (gmt 0)

That can be a very bad sign, IMO. Either it would cause duplicate penalty or not, you are at risk of having your ranks drop or disappear. I encountered this issue since Oct 05 and the return of ranking is painfully slow about few pages for the some targeted term but not universally throughout the site as before.

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