Pango / Glib config problem

[Anthony <orders nodivisions com>]

I'm running Gnome 2.2 on Slackware 9.0, and I'm trying to upgrade to 
Gnome 2.4.  I'm following the order of installation on this page:

http://www.gnome.org/start/2.4/notes/rninstallation.html

So I've intalled Glib 2.2.3.  But now Pango is giving me this error:

>>>
checking for GLIB - version >= 2.1.3...
*** 'pkg-config --modversion glib-2.0' returned 2.2.3, but GLIB (2.2.1)
*** was found! If pkg-config was correct, then it is best
*** to remove the old version of GLib. You may also be able to fix the error
*** by modifying your LD_LIBRARY_PATH enviroment variable, or by editing
*** /etc/ld.so.conf. Make sure you have run ldconfig if that is
*** required on your system.
*** If pkg-config was wrong, set the environment variable PKG_CONFIG_PATH
*** to point to the correct configuration files
<<<

It tells me where it's getting the 2.2.3 from, so why doesn't it tell me 
where it's getting the 2.2.1 from??

I've gone back and removed every directory on my system named glib-2.0 
(after trying lots of other stuff with no success), and then 
re-installed Glib 2.2.3, and it's still giving me the error.

So...
#1.  Where is the 2.2.1 coming from, and
#2.  Wouldn't it make sense for the installer(s) be changed so that they 
tell where they've found it, once they've found it?

Thanks,
Anthony