sudo port install httrack
--->  Computing dependencies for zlib
--->  Fetching zlib
--->  Verifying checksum(s) for zlib
--->  Extracting zlib
--->  Applying patches to zlib
--->  Configuring zlib
--->  Building zlib
--->  Staging zlib into destroot
--->  Deactivating zlib @1.2.3_2
--->  Computing dependencies for zlib
--->  Installing zlib @1.2.3_4
--->  Activating zlib @1.2.3_4
--->  Cleaning zlib
--->  Computing dependencies for httrack
--->  Fetching httrack
--->  Attempting to fetch httrack-3.43-7.tar.gz from
<http://arn.se.distfiles.macports.org/httrack>
--->  Attempting to fetch httrack-3.43-7.tar.gz from <http://www.httrack.com/>
--->  Verifying checksum(s) for httrack
Error: Checksum (md5) mismatch for httrack-3.43-7.tar.gz
Error: Checksum (sha1) mismatch for httrack-3.43-7.tar.gz
Error: Checksum (rmd160) mismatch for httrack-3.43-7.tar.gz
Error: Target org.macports.checksum returned: Unable to verify file checksums