some extra information to add. I have two rt2870 USB devices here. One
is a Linksys WUSB600N (ID 1737:0071 Linksys) and the other is an Edimax
ew7717UN (ID 7392:7717) which is slightly different than the device that
ctsdownloads is using.

If I add the line "blacklist rt2870sta" to
/etc/modprobe.d/blacklist.conf, neither of the devices appears to
function. They see some networks, but not my own (which is wifi-n with
WPA-PSK security) however they can not connect to any of these networks.

Blacklisting the "rt2800usb" module, however, allows both devices to
function.

ctsdownloads: rt2800usb was brought into the 2.6.31 kernel (see
http://kernelnewbies.org/LinuxChanges for a changelog, it's listed in
section 14.3), so that may explain why it's now being identified as
"wlan0" instead of "ra0". Although mine is showing ra0 while using
rt2870sta - did you reboot after blacking the rt2800usb driver? Have you
tried force removing it (sudo modprobe rt2800usb)?

Is it possible that it is just a matter of getting device IDs added to
the newer rt2800usb driver? I remember that needed to be done when
rt2870sta was included during the 9.04 alphas.

-- 
Karmic RC tries to load rt2870sta AND rt2800usb. Results in no WiFi
https://bugs.launchpad.net/bugs/460323
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