Welcome to the Q&A Forum

thanks bemcapaz & Marcus for expert advice. wht u think if we control how much content to be shown on tag pages .. like this http://www.lancelhoff.com/change-the-excerpt-length-wordpress/. is it ok? actually i m getting traffic from TAG pages too... .

I have a page indexed > (http://mysite.com/mypost) and also http://mysite.com/tag/mypost The same post shows up twice, one with /tag/ one without when I search site:http://mysite.com
Is this a duplicate content?? Can I get penalized for this?

In the All in one plugin should I check Use noindex for Tag Archives to avoid this or doesn't matter.
Thanks