Today i went to Google Webmaster Tools to check for duplicate meta description.
On almost all my news pages, this is true cause my rss feeds links to the news piece with a parameter (?rs=rss) so i can track my traffic from rss feeds.
I thought the following snippet would prevent this.
<link rel="canonical" href="http://www.example.com/section/textid/">
What am i missing to prevent Google Webmaster Tools to report duplicate meta description ?