After 20 minutes wifi would drop out or crash.
Settings
Wireless Mode: AP mode
Wireless Network mode: N/G
Wireless Channel: Auto
Wireless Security: WPA2 Personal Mixed
WPA Algorithms: TKIP+AES
After trying a 30/30/30 reset to no luck it was time to try something else
Stability of Wifi improved by changing Sensitivity Range (ACK Timing) from default of 2000 to 305 (correct size for my needs). To convert meters to feet for the WiFi coverage you need. Simplest way to get the conversion is to use Google. Keep in mind the default 2000 meters is 6561.67 feet way more than most of us need for coverage. The settings for Sensitivity Range (ACK Timing) can be found under the advanced settings of the wireless basic settings tab. Best pratice is to set it for 5% more than you need.
Other info its typical for me to have up to 6 wireless clients connected at once.
I susspect the stock 2000 timeing of this firmware may be over driving the radios or the boosters.
I would like to know what settings Buffalo is using to get the stabilty and, how many wireless access points are in the area. Here I have 7 in range.
:edited to add info: