After installing coreutils-8.12 on OSX 10.7 today, I found an issue immediately where df was overflowing the structure returned from statvfs. On OSX 10.7 the relevant fields of the statvfs structure are defined to be fsblkcnt_t, or only 4 bytes long. I have put together an initial fix for 10.7. Hope this helps.
Looking through your bug reports, I believe this is likely a fix for bug 7355. -Herb
coreutils_du.diff
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