There's a firmware update for the Kobo WiFi to 1.9.11.
To download it use:
download.kobobooks.com/firmwares/kobo2/kobo-update-1.9.11.zip
Been quite a while since the last update for the WiFi. No idea at this time as to what this update does. I do remember a while back that the last batches of Kobo Wifi's came with a firmware version 1.9.10 with no update for older units. One Kobo developer commented that there were no changes from the 1.9.0 firmware.
Regards,
David