gtk font problem?

[Robert Watkins <robert watkins net>]

I've installed gtk 2.4.10 (in theory) in order to test avidemux, but
I'm getting a problem that seems to tie back to my installation of
gtk. I even get this now when I run a stable version of the
application that had worked prior ot me installing gtk (and it's
dependencies)

Any assistance in troubleshooting would be helpful.

(avidemux2:7837): GLib-GObject-CRITICAL **: file gobject.c: line 1561
(g_object_ref): assertion `G_IS_OBJECT (object)' failed

** (avidemux2:7837): CRITICAL **: file pango-engine.c: line 68
(_pango_engine_shape_shape): assertion `PANGO_IS_FONT (font)' failed

** ERROR **: file shape.c: line 75 (pango_shape): assertion failed:
(glyphs->num_glyphs > 0)
aborting...
Aborted

Mostly random information that may be helpful.
pkg-config --modversion glib-2.0
2.4.6

pkg-config --modversion pango
1.4.1

gtk doesn't show up in --list-all option of pkg-config

I've got Mandrake 10.0 installed