must be something strange they have done to mandrake 10 and anti aliased tt fonts support
just like redhat they use that darn font server -- totally pointless unless you are serving fonts over a network
X has it's own modular support for freetype without the server but things need to be compiled with freetype support.
i know nothing about mandrake.
i hate to tell you about ways to try to fix it since i know so nothing about what they have done
i'm assuming the tt fonts you installed are working -- look at xfontsel to verify
if not work on getting them setup and recognized first
to test if x aa font support is working try
xterm -fa arial
if it doesn't complain about "RENDER" and the arial font looks all spaced out too far then x in compiled and setup ok and your driver is setup ok.
i guess check that aa fonts are turned on if they can be in whatever desktop you are using
there is a ckeck box under fonts for kde to use anti aliasing
if you want to try to bypass the fontserver and see if x works better
in xconfig file take out the line like
and instead put in actual paths
(this is mine don't copy it directly it's just an example)
make sure under modules you have