I'm posting this using my laptop at one of the APs that doesn't work. My laptop connects and gets an IP fine. My N810 does not. It just gives the unable to retrieve IP address and closes.

I was able to specify IP settings using the settings I retrieved from my laptop and connect via the N810.

So, as long as I have my laptop with me to connect to the open AP first, I'll be able to connect with the N810. This sucks.

It seems obvious to me that the dhcp client on the N810 is broken. Any help with fixing it would be greatly appreciated. I have no idea where to start.