Since the upgrade from Lenny to Squeeze on my Notebook Toshiba Satellite Pro U200 with Intel Pro/Wireless 3945 ABG I have wireless connection problems.
The connection breaks time to time and sometimes cannot connect automaticaly after restart.
iface wlan0 inet dhcp
Under Lenny I didn't have these problems.
BTW I didn't change anything on the wireless or network configurations on the notebook and on the wiereless router.