wi hostap tx speed again

Hi, i think there is a bug in wi driver again,
or in net layer about wi driver ?

I have card zcom XI-626 in hostap mode on
RELENG_5_3     5.3-RC1 FreeBSD 5.3-RC1 #0: Thu Oct 21 15:06:30 CEST 2004
RELENG_5     5.3-RELEASE FreeBSD 5.3-RELEASE #1: Tue Oct 26 00:14:48
CEST 2004

problem is that outgoing data from card to connected client not going
more than 40KB/s (downloading file using wget, scp)
we have tried set both variants of debug.mpsafenet=0 and
debug.mpsafenet=1 on few routers
but nothing changed.

on 5.2.1-RELEASE and lately 5.2-CURRENT was better
(except bug http://lists.freebsd.org/pipermail/freebsd-current/2004-May/027476.html)
but now in 5.3 it's really worse...  :(

i haven't changed any system configuration, i've only upgraded system

do anyone have the same problem, or idea where is the bug?

thanks for reply
Jiri