Macbook 2,1 8.04 single-boot : Continuous errors from madwifi in syslog and kernlog

I'm seeing this error showing up in my logs 3 times every second:

[timestamp][system name]kernel: [11747.073299] wifi0: ath_rxorn_tasklet: Receive FIFO overrun; resetting.

What could be causing this? I installed madwifi the same way I did in 7.04, following the macbook wiki page.

Wifi works, but the connectio dies occasionally, more often than in 7.04. Sometimes I am unable to reconnect even though the network is still there.

Here's my iwconfig output when disconnected:

lo no wireless extensions.

eth0 no wireless extensions.

wifi0 no wireless extensions.

ath0 IEEE 802.11g ESSID:"" Nickname:""
Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
Bit Rate: 1 Mb/s Tx-Power: 14 dBm Sensitivity=1/1
Retry: off RTS thr: off Fragment thr: off
Power Management: off
Link Quality=39/70 Signal level=-55 dBm Noise level=-94 dBm
Rx invalid nwid: 659248 Rx invalid crypt: 0 Rx invalid frag: 0
Tx excessive retries: 0 Invalid misc: 0 Missed beacon: 0

are you using network-manager? there have been reposted issues with madwifi and n-m. Try wicd.