With actual kamikaze trunk releases (~r12900) and both stable and trunk 0.9.4 madwifi branches I can't set fixed TX rate of Atheros wlan card in AP mode nighter using eg 'option rate 11M' in /etc/conifg/wireless nor typing 'iwconfig ath0 rate 11M'. It was possible with old kamikaze release (tested with r9644 madwifi r2978-20071127).
Using automatic sample rate estimators like eg. minstrel do not give good performance in my network (outdoor AP, ~20 wlan clients), so until I can't set fixed rate, new releases of kamikaze with many buxfixes are useless to me and I have to stick with old one...

Is this issue is related to madwifi or wireless tools version? or maybe some other things?

PLEASE HELP!
thanks