does Google penalize you if you have the regular URL like url/showthread.php?t=3333 and the mod rewrite URL url/t3333-this-subject-in-rewrite.html that points to the same page. Is this duplicate content?
The reason I am asking is my forum is not indexed on 2 of my sites and is indexed OK on another one. I was wondering if this mod would hurt indexing when google spiders through the non-rewrite urls.
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