g1smd - 6:32 pm on Aug 20, 2012 (gmt 0)
You mean the non-www to www redirect?
If the site has been around for a long time without it, I would instead use the
rel="canonical" tag here.
Make sure you register both www and non-www URLs in Google webmastertools. Look at the crawl stats and crawl errors reports for both. Likewise look at the internal linking and incoming external links reports. They are separate for www and for non-www.