Slackware 12.2, /etc/X11/xorg.conf , created with xorgconfig :
# This loads the font modules
# Load "type1"
# Load "xtt"
Which means : Load "freetype" works, the others lines are uncommented.
So please try editing to have ' Load "freetype" ' only.
Or may be create a new file with 'xorgsetup'.
( xorgconfig is complicated, if you haven't used it before.)