A bit of experimentation suggests that it's a whole lot more stable when network manager is replaced with wicd. I've had it running for about 10 hours with wicd managing the wifi and it hasn't dropped out once. I guess the repeated scanning that n-m does upsets it or something. Haven't checked with the 2.5.0 drivers to see if they cause issues with wicd.
A bit of experimentation suggests that it's a whole lot more stable when network manager is replaced with wicd. I've had it running for about 10 hours with wicd managing the wifi and it hasn't dropped out once. I guess the repeated scanning that n-m does upsets it or something. Haven't checked with the 2.5.0 drivers to see if they cause issues with wicd.