I'm getting the correct checksums from http://distfiles.macports.org/atkmm
---> Attempting to fetch atkmm-2.22.1.tar.bz2 from http://distfiles.macports.org/atkmm
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 684k 100 684k 0 0 1079k 0 --:--:-- --:--:-- --:--:-- 1341k
---> Verifying checksum(s) for atkmm
DEBUG: checksum phase started at Fri Dec 10 15:43:22 PST 2010
DEBUG: Executing org.macports.checksum (atkmm)
---> Checksumming atkmm-2.22.1.tar.bz2
DEBUG: Correct (md5) checksum for atkmm-2.22.1.tar.bz2
DEBUG: Correct (sha1) checksum for atkmm-2.22.1.tar.bz2
DEBUG: Correct (rmd160) checksum for atkmm-2.22.1.tar.bz2
Please run
sudo port clean --all atkmm
sudo port -d checksum atkmm
and report which site you are fetching from