Why does my entire site show duplicate page titles for every single page? I have palced a canonical tag on index page will this correct the problem?

[joeG66]

duplicate page indexing

[farlandlee]

my guess is you have the same title tag on every page (possibly due to a php include file?) but without a link to the site it is impossible to tell.

If I understand the second part of your question then no a canonical link on your index page will not solve the problem.  You had a canonical link to the head of any page showing duplicate content linking back to the main (i.e., canonical) version of that content.  You can read about it in greater detail from Google here: http://support.google.com/webmasters/bin/answer.py?hl=en&answer=139394

Hope that helps

[Francisco_Meza]

Make sure the non-www points to the www version or vice versa. If you have example.com and www.example.com, then you might run into this problem.