So many questions asked here are repetitive and nothing more than rehashed rumours and imaginary fears. I'm sure most of you know of Matt Cutts, if you aren't aware that he records regular videos answering webmaster questions then I suggest subscribing to the Youtube Channel because his videos answer A LOT of stuff that is asked so often - things like duplicate content, ranking factors, cross linking etc etc
Take a couple of hours to watch his videos, most are very short, I'm sure this will clear up some misconceptions for you and hopefully lead to people asking less repetitive and paranoid questions here!
http://www.youtube.com/user/GoogleWebmasterHelp
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