Arch Linux

i have a fresh install of archlinux on a PIII dell with i810 integrated. When using KDE and running GTK2 apps, they dont use antialiased fonts (i set it in the control panel to use antialiased fonts), and some text are visible only when i put the mouse over it once, or drag the window out of the screen, and then back. In other WMs everything is fine...

here is a screenshot showing the problem: http://img111.imageshack.us/my.php?image=snapshot11du.png

I didn't changed any config file regarding to fonts or gtk settings.
I have an other machine (wich is broken for a week) with archlinux installed (i installed it some months ago, and updated it recently), and there was no error like this.