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As far as I understand with character sheets, is that you can design your own without any worries as to copyright infringement, as long as you leave off the obvious Vampire or other trademarked names.
There's nothing stopping you from creating an Excel spreadsheet, or PDF file for your own personal use. You can even scan or photocopy the sheet in the back of the book. You can even download a PDF version from their website.
What you can't do is mass-produce and sell them. And I would avoid publicly posting something they created. Creating your own PDF, XLS, XML or whatever character sheet and posting it shouldn't prove a problem.
It really boils down to common sense. If you aren't publicly posting things and you aren't selling them or mass distributing them, anything you do is pretty much "personal use". If you post it on your blog or personal website, you're taking a risk, but my guess would be (and I'm no lawyer) that the risk is pretty slight.
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This is why I say distribute without the rules, just make a character sheet and remove the rules in the xml. Sure by some definition that would still be a breach in some circles.