I too upgraded to 1.11 last week and I am getting lockups every 24 hours. I have done a hard reset of the router and started from scratch twice... still doesn't fix the problem.
I am going to try the "turn off DNS Relay" as suggested by someone else on this forum and see if that fixes it.
Also, I know if says you can't downgrade the firmware... has anyone actually confirmed this?
If ANYONE has a solution, PLEASE HELP. I am about to say goodbye to D-Link as my home networking company of choice if I can't get quick resolution to this.
Ethan