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These layouts (customized CSS, markup, PSD files) are owned by Powered by Pastries. Downloading free layouts from Powered by Pastries does not mean you own them. Rather, you are given permission to use them. You may use these layouts for your commercial blogs, but you may not sell them or build your work upon them (and then sell them) unless you have written permission from Powered by Pastries.
Downloading or installing any of the free layouts does not come with support -- you are making changes to your blog at your own risk and Powered by Pastries is in no way responsible for any negative ramifications to your blog.
All these legal things aside, I hope you enjoy using these layouts!