glib version not recognized while upgrading pango

[Robert Huff]

huff@> portupgrade -R pango-1.2.5_1

===>  Installing for glib-2.2.3_1
===>   glib-2.2.3_1 depends on file: /usr/local/bin/perl5.6.1 - found
===>   glib-2.2.3_1 depends on executable: pkg-config - found
===>   Generating temporary packing list
===>  Checking if devel/glib20 already installed
===>   glib-2.2.3_1 is already installed
      You may wish to ``make deinstall'' and install this port again
      by ``make reinstall'' to upgrade it properly.
      If you really wish to overwrite the old port of devel/glib20
      without deleting it first, set the variable "FORCE_PKG_REGISTER"
      in your environment or the "make install" command line.
*** Error code 1

Stop in /usr/ports/devel/glib20.
*** Error code 1

Stop in /usr/ports/x11-toolkits/pango.
** Command failed [exit code 1]: /usr/bin/script -qa /tmp/portupgrade16831.13 make
** Fix the problem and try again.
** The following packages were not installed or upgraded (*:skipped / !:failed)
        ! x11-toolkits/pango (pango-1.2.5_1)    (new compiler error)

	Why is the dependency not being properly parsed?
	(FreeBSD 5.2 as of March 8; ports tree updated every midnight)


				Robert Huff