i am using wifi usb adapter with a realtek 8192cu i can confirm that using kernel drivers (linux-image-3.2.0-2-amd64) does not work properly and i am unable to connect to my home access point
right now i am using latest realtek drivers (RTL8188C_8192C_8192D_USB_linux_v3.3.2_3192.20120103) and it works so it seems to be a driver problem