I just tried my first wifi sync on my KT (ver 2.0.0) -- I was also booting up my Macbook laptop at the same time. The KT logged in to the wifi after I typed the wifi password, and proceeded to sync. Then my Mac, which I had powered on after the KT, popped up a message that another device was using the IP address of this Mac. Is that supposed to happen? i.e., is the KT supposed to have its own IP address? perhaps that is why people have trouble, if their IP address is already in use when the KT is trying to log in to the wifi? I am no expert...
My KT did not automatically upgrade the firmware to 2.0.2, which is what I thought would happen. Isn't 2.0.2 the latest firmware level for Japan? How can I get it to upgrade? Do I have to open Kobo Desktop? I did that yesterday, and connected with the USB cable, but it didn't upgrade then either. I am in Japan, so I figured it would upgrade.
I downloaded a free Japanese book over the wifi to see what would happen. It came in ok, and I opened it and changed the font to Ryumin, and it looks fine. Took a minute to figure out that I had to tap on the left side of the page to turn the pages

Now to practice reading right to left and up and down....
ja ne