Cannot disable Pango

[Peter Smith]

I have compiled Mozilla Firefox 3.6.17 on Debian Squeeze. I do not
want to disable Pango at compile time but at run time. I have added
following lines to ~/.profile

export MOZ_DISABLE_PANGO=1
export MOZ_ENABLE_PANGO=0

These values are correctly exported, but Firefox completly ignores
this as Pango is still loaded at runtime:

TOMOYO-WARNING: Access 'read(open)
/usr/lib/pango/1.6.0/module-files.d/libpango1.0-0.modules'
TOMOYO-WARNING: Access 'read(open)
/usr/lib/pango/1.6.0/modules/pango-basic-fc.so'
...


Any ideas on what i am doing wrong?