tedster - 7:18 pm on Sep 19, 2012 (gmt 0)
Just my personal opinion, but I don't think that's exactly what indyank meant. It seems to me that he's talking about the canonical link element in the <head> section. That's a very reasonable approach to this kind of Wordpress trouble, and there are canonical tag plug-ins available to help with the job.
<link rel="canonical" href="http://example.com/page1/">
That way, search engines that read the canonical link will know that, no matter what exact URL they requested, the URL to be indexed is shown in the <head>. There are over 40 possible canonical problems [webmasterworld.com] and many of them can be challenging to deal with depending on your hosting.
The URL listed in a canonical link is not 100% binding, technically - but Google does take it as a very strong suggestion. For that reason it is best to deal with the potential canonical errors [webmasterworld.com] directly on your server whenever you can.
Before you go live with a canonical link, it's good to double check to be sure you aren't creating any canonical disasters [webmasterworld.com].