How to prevent duplicate title?
 

In google.com search box, I typed site:myblogname.com and I see the google results shows duplicated titles for [Newer Posts] and [Older Posts] and very near to duplicated titles that is auto generated. See screenshot: trzy.in

Read this article: http://moz.com/community/q/avoiding-...best-practices This will helps you to prevent duplicate title for your website.

"Another common issue we see is when a webmaster uses the same title on almost all of a website’s pages, sometimes exactly duplicating it and sometimes using only minor variations. Lastly, we also try to replace unnecessarily long or hard-to-read titles with more concise and descriptive alternatives."

More info: googlewebmastercentral(dot)blogspot(dot)in/2012/01/better-page-titles-in-search-results.html

You should check Google webmaster tool regarding Google's warning about duplicate title tag. If yes then edit your title and resubmit sitemap.