bcm43xx will not load if FC5 is booted on the machine with more than 1GB of RAM. The error reported is:
bcm43xx: >>>FATAL ERROR<<< DMA RX SKB >1G (0xde051010, len: 2404)
If I limit the amount of memory using the mem=768M kernel boot option, then "modprobe bcm43xx" works fine, and I can bring the adapter up ... even WPA works fine.
Wireless card is Linksys WCM54GS (it has Broadcom 4318E chip).
# uname -a
Linux localhost.localdomain 2.6.16-1.2122_FC5 #1 SMP Sun May 21 15:01:10 EDT 2006 x86_64 x86_64 x86_64 GNU/Linux