Doxygen fails checksums

[Rodolfo Aramayo]

I am consistently observing the following:

#########################################################################
--->  Verifying checksum(s) for doxygen
Error: Checksum (md5) mismatch for doxygen-1.8.1.src.tar.gz
Error: Checksum (sha1) mismatch for doxygen-1.8.1.src.tar.gz
Error: Checksum (rmd160) mismatch for doxygen-1.8.1.src.tar.gz
Error: org.macports.checksum for port doxygen returned: Unable to
verify file checksums
Please see the log file for port doxygen for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_textproc_doxygen/doxygen/main.log
Error: Unable to upgrade port: 1
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets
#########################################################################

Ideas?

Thanks