Comment 4 for bug 720439

I got a little more insight in this problem. It's kernel related. Sometimes I have my airport card working and then I receive a kernel oops:
[ 256.069813] ------------[ cut here ]------------
[ 256.069854] Badness at /build/buildd-linux-2.6_2.6.32-30-powerpc-wZZD8S/linux
-2.6-2.6.32/debian/build/source_powerpc_none/net/wireless/core.c:614
[ 256.069876] NIP: e1e5a664 LR: e1e5a640 CTR: c03755ac
[ 256.069894] REGS: df85be80 TRAP: 0700 Not tainted (2.6.32-5-powerpc)
[ 256.069906] MSR: 00029032 <EE,ME,CE,IR,DR> CR: 24000028 XER: 20000000
[ 256.069941] TASK = df849bc0[5] 'events/0' THREAD: df85a000
[ 256.069951] GPR00: c21cf800 df85bf30 df849bc0 00000000 00000000 00000000 0000
2b80 0000003b
[ 256.069982] GPR08: 00000000 00000001 df803300 d51ba880 24000022 00000000 0181
2550 018126bc
[ 256.070012] GPR16: 018124c4 c042301c c0423054 c045e098 00000001 c0508410 0000
0000 c05083a0
[ 256.070042] GPR24: df85bf58 df85a000 df803308 e1e5a60c df849bc0 c21cf00c c21c
fb60 c21cf000
[ 256.070148] NIP [e1e5a664] wdev_cleanup_work+0x58/0xfc [cfg80211]
[ 256.070179] LR [e1e5a640] wdev_cleanup_work+0x34/0xfc [cfg80211]
[ 256.070190] Call Trace:
[ 256.070218] [df85bf30] [e1e5a640] wdev_cleanup_work+0x34/0xfc [cfg80211] (unr
eliable)
[ 256.070254] [df85bf50] [c005dcdc] worker_thread+0x1b4/0x22c
[ 256.070279] [df85bfc0] [c0061aec] kthread+0x74/0x78
[ 256.070302] [df85bff0] [c0014adc] kernel_thread+0x4c/0x68
[ 256.070313] Instruction dump:
[ 256.070328] 3be9ff40 7fa3eb78 4801541d 817f0078 39200000 2f8b0000 419e0018 81
2b0018
[ 256.070373] 801e0010 7d290278 7d290034 5529d97e <0f090000> 2f890000 41be0018
38000001

If I rmmod airport and orinoco and modprobe them again, I can connect normally again.