Hmm, looks like you need to load the extmod module in your xorg.conf. That should give you the XFree86-Misc extension:
You'll have to restart the X server for that change to take effect. After doing so, check to see if you have the extensions loaded, like this: xdpyinfo | grep -i misc
You should see output like this:
By the way, if you want to use anti-aliased fonts you should load the "freetype" module in your xorg.conf, if it's not already in there.