The old digest reports a much larger file so portage tries to resume the download all the time. Updating the digest, I can emerge drscheme-205 just fine. Reproducible: Always Steps to Reproduce:
thre must have been something bogus in your system, the digest matches for me
I checked it with another user on #gentoo-bugs, tried rm /usr/portage/distfiles/* and emerge rsync. But hey, if it works that's great!
well i tested it before i closed the bug ;) maybe someone fixed the digest in the meantime