Install failure due to Checksum (md5) mismatch for patch

[System Admin]

Last login: Sun Aug 15 20:18:56 on ttys000
server:~ sadmin$ sudo port install php5-gd +apache2 +debug +fastcgi +gmp +imap +ipc +macports_snmp +mysql5 +mysqlnd +pcntl +pear +postgresql83 +pspell +sockets +sqlite +tidy
Password:
--->  Computing dependencies for php5-gd
--->  Dependencies to be installed: freetype zlib jpeg libpng php5 apache2 apr apr-util db46 expat libiconv gperf mysql5 openssl readline ncurses ncursesw postgresql83 bison gettext m4 libxml2 libxslt ossp-uuid sqlite3 pcre bzip2 autoconf213 gawk perl5 perl5.8 gsed libtool automake autoconf help2man p5-locale-gettext mhash pkgconfig
--->  Fetching zlib
--->  Attempting to fetch zlib-1.2.5.tar.bz2 from http://www.zlib.net/
--->  Verifying checksum(s) for zlib
--->  Extracting zlib
--->  Applying patches to zlib
--->  Configuring zlib
--->  Building zlib
--->  Staging zlib into destroot
--->  Installing zlib @1.2.5_0
--->  Activating zlib @1.2.5_0
--->  Cleaning zlib
--->  Fetching freetype
--->  Attempting to fetch freetype-2.4.2.tar.bz2 from http://downloads.sourceforge.net/freetype
--->  Attempting to fetch freetype-doc-2.4.2.tar.bz2 from http://downloads.sourceforge.net/freetype
--->  Verifying checksum(s) for freetype
--->  Extracting freetype
--->  Applying patches to freetype
--->  Configuring freetype
--->  Building freetype
--->  Staging freetype into destroot
--->  Installing freetype @2.4.2_0
--->  Activating freetype @2.4.2_0
--->  Cleaning freetype
--->  Fetching jpeg
--->  Attempting to fetch jpegsrc.v8b.tar.gz from http://www.ijg.org/files/
--->  Verifying checksum(s) for jpeg
--->  Extracting jpeg
--->  Configuring jpeg
--->  Building jpeg
--->  Staging jpeg into destroot
--->  Installing jpeg @8b_0
--->  Activating jpeg @8b_0
--->  Cleaning jpeg
--->  Fetching libpng
--->  Attempting to fetch libpng-1.2.44.tar.bz2 from http://downloads.sourceforge.net/libpng
--->  Verifying checksum(s) for libpng
--->  Extracting libpng
--->  Configuring libpng
--->  Building libpng
--->  Staging libpng into destroot
--->  Installing libpng @1.2.44_0
--->  Activating libpng @1.2.44_0
--->  Cleaning libpng
--->  Fetching apr
--->  Attempting to fetch apr-1.4.2.tar.bz2 from http://www.ibiblio.org/pub/mirrors/apache/apr
--->  Verifying checksum(s) for apr
--->  Extracting apr
--->  Applying patches to apr
--->  Configuring apr
--->  Building apr
--->  Staging apr into destroot
--->  Installing apr @1.4.2_1
--->  Activating apr @1.4.2_1
--->  Cleaning apr
--->  Fetching db46
--->  Attempting to fetch patch.4.6.21.1 from http://www.oracle.com/technology/products/berkeley-db/db/update/4.6.21/
--->  Attempting to fetch patch.4.6.21.2 from http://www.oracle.com/technology/products/berkeley-db/db/update/4.6.21/
--->  Attempting to fetch patch.4.6.21.3 from http://www.oracle.com/technology/products/berkeley-db/db/update/4.6.21/
--->  Attempting to fetch patch.4.6.21.4 from http://www.oracle.com/technology/products/berkeley-db/db/update/4.6.21/
--->  Attempting to fetch db-4.6.21.tar.gz from http://distfiles.macports.org/db4/4.6.21_6
--->  Verifying checksum(s) for db46
Error: Checksum (md5) mismatch for patch.4.6.21.1
Error: Checksum (md5) mismatch for patch.4.6.21.2
Error: Checksum (md5) mismatch for patch.4.6.21.3
Error: Checksum (md5) mismatch for patch.4.6.21.4
Error: Target org.macports.checksum returned: Unable to verify file checksums
Log for db46 is at: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_databases_db46/main.log
Error: The following dependencies failed to build: php5 apache2 apr-util db46 expat libiconv gperf mysql5 openssl readline ncurses ncursesw postgresql83 bison gettext m4 libxml2 libxslt ossp-uuid sqlite3 pcre bzip2 autoconf213 gawk perl5 perl5.8 gsed libtool automake autoconf help2man p5-locale-gettext mhash pkgconfig
Error: Status 1 encountered during processing.
To report a bug, see <http://guide.macports.org/#project.tickets>
server:~ sadmin$ 

Any ideas where to go next ?