How to get Anti aliasing fonts in Gnome?

[Jaap Haitsma <jaap@haitsma.org>]

Hi,

I have the problem that anti aliasing does not seem to work. See for 
example the font in the attachment.
I already browsed quite a bit on the web but didn't find the solution.

Jaap

BTW My system is a fresh install of Debian unstable using the Debian 
installer and then selecting Desktop for my installation.