I need to keep the router in the mixed Auto WPA/WPA2 mode. On the days when my daughter is home from college, I want to make sure her laptop connects. I did not have a chance to determine whether the problem disappears in WPA2 only mode.
The DIR-655 is manually set to channel 11. I'm in a single family house. Because my son sometime connects to XBox Live on his XBox 360 via the DGL-3420, I need to have a second router, the DI-634M, manually set to channel 6 and set up as a wireless access point connected via ethernet cable to the DIR-655 (I cannot connect the DGL-3420 wirelessly to the DIR-655, since that slows speeds to below 11b rates, at least with the 1.05 firmware). The DGL-3420 was unplugged when I checked the 1.10 firmware, and the connection rate instantly decreased upon upgrading to 1.10 and instantly increased upon downgrading to 1.05. I'm thinking its probably the Mixed WPA/WPA2 setting, but, as I said, I didn't have a chance to test that theory.