I recently updated as well on a DIR-825 and I'm seeing the exact same problem. I was running on 1.01 and waited until the full version which is 1.11 came out and it seemed to work fine, but with in a day or two I have the exact same symptoms. I can't connect to the router and nothing on the WAN side although the LAN appears fine. I have to reset the router each time to get things working again. I know the 825 and 655 are not identical, but seem similar and the firmwares came out within days of each other.
Jeff