Duplication issue on my website

[wmsindia]

hi

I have a cms website with 2000 pages.my problem is that

1. www.test.com/abc.html

2.  www.test.com/abc.html?gallery?123testing

it showing duplication page in me seomoz  error list. It is a single page.

Please suggest solution for it

[EEE3]

Dr. Pete has a really helpful article on this, particularly his tools to fix the issues of duplicate content: http://www.seomoz.org/blog/duplicate-content-in-a-post-panda-world

[irvingw]

all you have to do is.

a) list the ?gallery parameter in WMT url parameter handling.

you can also block in in your robots.txt from being crawled.

This is a definite duplicate content issue, but Google will usually get it right on their own and omit these results in search. Still needs to be fixed though.