wipe and reinstall everything did the trick for me.
Also I used the kernel included in the ignorance download this time.
Wifi works fine, restarting bug fixed as well.
It is most definitely a tablet!
But I am not sure why I should be thrilled about multiuser management.
The thing with nexus 7 is that, while its no phone nor a 10", you always take it with you.
So in my opinion there is not much point in mu...