Continued problems with Aironet device and 5.2-RC

Hi,

I was able to get rid of "an0: failed to read RID ff50 7f21 21 0 2eab, 3"
messages, but my connection still eventually drops when transmitting data.
 
I tried many different IRQ combinations in the BIOS setup.  Some combinations go
t rid of the error message above, and some combinations had more stable results
that would NOT partially freeze my system.
 
Another strange thing I noticed...
 
After the connection would drop, I wasn't able to reconnect to my Access Point -
even after a reboot, until I powered down, and powered back up the AP!
 
I don't think there's any problem with the AP as it works without problems under
5.1-RELEASE.
 
I also tried booting with ACPI disabled but there was no difference.  I
monitored system activity using 'systat 1 -vmstat' on both 5.1-RELEASE and 5.2
-RC, but nothing really stood out as being the problem.

There is also an fxp0: Intel Pro/100 VE NIC on my machine and it hasn't shown
any problems.

My Cisco Aironet 350 card has a downgraded firmware - version 5.00.01.  I have
also tried newer firmware versions just in case, without any luck.  Making the
transition from 5.1-RELEASE to 5.2-RC I didn't change any BIOS settings, and I
built the kernel identical to what I had setup under 5.1-RELEASE.

Has anyone else had similar problems with 'an', and 5.2-RC?

Is there anything obvious I'm missing?