Kernel Panic with at76c503a

Hello all,

I have had a lot of success using these drivers (thank you!), but on a newer 
system of mine I am getting intermittent kernel panics.  The kernel log 
seems to indicate that it's happening in the at76_usb module:

...
Mar 20 21:20:23 obox eth1394: eth2: IEEE-1394 IPv4 over 1394 Ethernet 
(fw-host1)
Mar 20 21:20:23 obox /root/tmp/at76c503a/at76c503.c: Atmel at76c50x USB 
Wireless LAN Driver 0.14dev loading
Mar 20 21:20:23 obox ieee1394: Host added: ID:BUS[1-00:1023]  
GUID[0011d8000096d129]
Mar 20 21:20:23 obox /root/tmp/at76c503a/at76c503.c: firmware version 
1.101.2 #84 (fcs_len 4)
Mar 20 21:20:23 obox /root/tmp/at76c503a/at76c503.c: device's MAC 
00:09:5b:30:d2:f5, regulatory domain FCC (U.S) (id 16)
Mar 20 21:20:23 obox /root/tmp/at76c503a/at76c503.c: registered wlan0
Mar 20 21:20:23 obox usbcore: registered new interface driver at76_usb
Mar 20 21:20:23 obox EXT3 FS on sda3, internal journal
Mar 20 21:20:23 obox kjournald starting.  Commit interval 5 seconds
Mar 20 21:20:23 obox EXT3 FS on sda4, internal journal
Mar 20 21:20:23 obox EXT3-fs: mounted filesystem with ordered data mode.
Mar 20 21:20:23 obox Adding 4000176k swap on /dev/sda2.  Priority:-1 
extents:1 across:4000176k
Mar 20 21:20:23 obox Real Time Clock Driver v1.12ac
Mar 20 21:20:26 obox /root/tmp/at76c503a/at76c503.c: 2799: assertion 
dev->istate == INIT failed
Mar 20 21:20:27 obox /root/tmp/at76c503a/at76c503.c: 2769: assertion 
dev->istate == SCANNING failed
Mar 20 21:21:57 obox Linux version 2.6.19-gentoo-r5 (root@obox) (gcc version 
4.1.1 (Gentoo 4.1.1-r3)) #2 SMP PREEMPT Wed Mar 7 21:37:39 PST 2007
Mar 20 21:21:57 obox Command line: root=/dev/ram0 real_root=/dev/sda3 
vga=791 splash=silent init=/linuxrc ramdisk_size=4278 CONSOLE=/dev/tty1
...

Sometimes it will panic on boot, othertimes it will run for quite some time 
before a panic occurs.  I am using a CVS snapshot as of today (March 20, 
2007), but this also occurs with the Gentoo package (14_beta1).

My specs are:
>uname -a
Linux obox 2.6.19-gentoo-r5 #2 SMP PREEMPT Wed Mar 7 21:37:39 PST 2007 
x86_64 AMD Athlon(tm) 64 Processor 3200+ AuthenticAMD GNU/Linux

>lsusb
Bus 003 Device 001: ID 0000:0000
Bus 004 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000
Bus 002 Device 004: ID 0864:4102 NetGear, Inc. MA101 802.11b Adapter
Bus 002 Device 003: ID 046d:c03d Logitech, Inc.
Bus 002 Device 001: ID 0000:0000

Thanks,
Owen