Lapizuli - 7:10 pm on Nov 1, 2010 (gmt 0)
I am not a lawyer, but...
Copyright violations are not limited to exact copies...courts tend to recognize substantial similarity.
In copyright law, "copying" denotes two separate but interrelated concepts. To constitute an infringement of copyright, a work must be a "copy" in the sense that it is substantially similar to a copyrighted work, it must have been "copied" from the copyrighted work as opposed to being the result of coincidental, independent production or from being taken from the same source as the copyrighted work.