You found a bug in grml 0.5 not yet mentioned on this page or in the grml bug tracking system? Please report it!
you have to use '-Dwext' for wpa_supplicant to use the wireless extensions when wpa_supplicant is running. Adjust $OPTIONS in /etc/default/wpasupplicant, for example using:
OPTIONS="-Dwext -i eth1 -c /etc/wpa_supplicant.conf"
Could not init font path element /usr/X11R6/lib/X11/fonts/misc/, removing from list!