Things seem also be working without problems with the Ubuntu-supplied driver in linux-image-3.8.0-27-generic 3.8.0-27.40, but with the newer firmware.
$ sha1sum /lib/firmware/rtlwifi/rtl8192cfw.bin bbd9b4e2c53e18df3aed03d22eee8d8c22ef9a8e /lib/firmware/rtlwifi/rtl8192cfw.bin
Things seem also be working without problems with the Ubuntu-supplied driver in linux-image- 3.8.0-27- generic 3.8.0-27.40, but with the newer firmware.
$ sha1sum /lib/firmware/ rtlwifi/ rtl8192cfw. bin f3aed03d22eee8d 8c22ef9a8e /lib/firmware/ rtlwifi/ rtl8192cfw. bin
bbd9b4e2c53e18d