I too am seeing the “Please check input and try again” message. My settings are being saved despite it. Also, my “Weather Adjustment Options” dialog has always had that reset issue. I found that I can usually get around it if after clicking “Submit” in the dialog, I immediately click the Edit Option’s back button and save my changes. YMMV
Firmware: 2.1.5(2), Hardware Version:2.3 – DC