Here is F15's version from my laptop:
[rejon@slowtop ~]$ sed --version
GNU sed version 4.2.1
Copyright (C) 2009 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE,
to the extent permitted by law.
GNU sed home page: <http://www.gnu.org/software/sed/>.
General help using GNU software: <http://www.gnu.org/gethelp/>.
E-mail bug reports to: <email address hidden>.
Be sure to include the word ``sed'' somewhere in the ``Subject:'' field.
Brad, what is your version: sed --version and paste the output here?
You can try to update with: sudo port instal sed
if the versions are out of sync, then run the build process again to see if repaired.