Here the same problem. Getting crazy about is. Strange thing is when the connection is lost i can't login to the router and my ip adres changes from 192.168.0.199 to 169.254.227.158
After the problem exist i made a screenshot. Maybe someone of you know what the problem is:

OS: Windows 7 x64
All drivers are up to date.
DIR655 1.34EU firmware. (also had the same whit 131EU)
I have also made a screenshot after the reset. If someone wants to see, just let me know.
Now i conected my computer direct to the internet and when i look in the log of windows i see two DHCP-Client errors
An error occurred while initializing the adapter 11. Error Code: 0x490
What is adapter11?
and
This computer is the network address (the DHCP server) is not renewed for the Network Card with network address 0x00241DD6300F. The following error occurred: 0x490. The computer will keep trying to own an address from the server with network address (DHCP server) to obtain.
Thanks for the help.