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I have multiple computers at home and the download is so quick I don't bother keeping a copy on my fileserver.
I also download nightlies, lots of them, and ocassionally I get sick of a certain bug so I migrate back to 1.0, which usuallly requires me to download it again.
Also I am at a University and on lab computers I really don't care to use IE, so I download Firefox for each lab computer I'm at.
Overall, I've probably downloaded 1.0 around 20 times.