new driver causes too big fonts?

[Martin Jordan <fanti at spin dot de>]

hello!

the fglrx driver worked very well for many month on my samsung x20-II notebook 
(ati X600 pci-e).

since the fglrx driver update 2 days ago all fonts (running xorg on 
debian/unstable) are a way too big.

i.e. see "konsole": http://fanti.staff.spin.de/new_fglrx.png

with no changes of any configuration, kde-setting or something else, but with 
the old driver (and also old kernel module), it looks as "normal"

like: http://fanti.staff.spin.de/old_fglrx.png

old version which works:
fglrx-driver_8.16.20-1_i386.deb
fglrx-kernel-src_8.16.20-1_i386.deb

new version which causes that font-trouble?!?
fglrx-driver_8.18.6-1_i386.deb
fglrx-kernel-src_8.18.6-1_i386.deb

what's wrong here with my fonts and the new driver?

thanks!

-- 
Martin Jordan - SPiN AG
fanti at spin dot de