If you're not having any issues with your current firmware, better not update it. Anyways, end of the day its yours choice.
I'm facing disconnection problem with new firmware. I know there are others who want to revert back to old firmware because of the same.
FW version 11.826.03.01.420 is stable and 11.831.05.01.420 is creating problems as per the experiences our forum members.
dushie also wants to revert back to his old FW.