checksum mismatch for pkg-config

[Sonia Hamilton]

I'm trying to install git-core, and I'm getting "checksum mismatch"
errors (see output below).

I'm wondering how I solve this problem?

I've installed the XCode tools and X Window system, and I've
successfully installed nmap:

manzana:~ sonia$ port installed
The following ports are currently installed:
  bzip2 @1.0.5_3+darwin (active)
  libpcap @1.0.0_0 (active)
  ncurses @5.7_0+darwin_10 (active)
  ncursesw @5.7_0+darwin_10 (active)
  nmap @5.00_0 (active)
  openssl @0.9.8l_0+darwin (active)
  pcre @7.9_0 (active)
  readline @6.0.000_2+darwin (active)
  zlib @1.2.3_3 (active)




manzana:~ sonia$ sudo port -d selfupdate
--->  Updating the ports tree
DEBUG: Synchronizing ports tree(s)
Synchronizing local ports tree from
rsync://rsync.macports.org/release/ports/
DEBUG: /usr/bin/rsync -rtzv --delete-after
rsync://rsync.macports.org/release/ports/
/opt/local/var/macports/sources/rsync.macports.org/release/ports
receiving file list ... done

sent 36 bytes  received 417002 bytes  119153.71 bytes/sec
total size is 29394343  speedup is 70.48
DEBUG: MacPorts sources location:
/opt/local/var/macports/sources/rsync.macports.org/release/base
--->  Updating MacPorts base sources using rsync
receiving file list ... done

sent 36 bytes  received 6865 bytes  2760.40 bytes/sec
total size is 4021380  speedup is 582.72
MacPorts base version 1.8.1 installed,
DEBUG: Rebuilding and reinstalling MacPorts if needed
MacPorts base version 1.8.1 downloaded.
--->  MacPorts base is already the latest version
DEBUG: Setting MacPorts sources ownership to root

The ports tree has been updated. To upgrade your installed ports, you
should run
  port upgrade outdated
manzana:~ sonia$ sudo port install git-core
--->  Computing dependencies for git-core
--->  Verifying checksum(s) for pkgconfig
Error: Checksum (md5) mismatch for pkg-config-0.23.tar.gz
Error: Checksum (sha1) mismatch for pkg-config-0.23.tar.gz
Error: Checksum (rmd160) mismatch for pkg-config-0.23.tar.gz
Error: Target org.macports.checksum returned: Unable to verify file
checksums
Error: The following dependencies failed to build: curl pkgconfig expat
libiconv gperf p5-error perl5 perl5.8 rsync popt gettext
Error: Status 1 encountered during processing.