Tried this silly little digicam with NetBSD.. crash bang boom:

umass0 at uhub2 port 2 configuration 1 interface 0
umass0: ZORAN COACH DSC, rev 1.00/1.00, addr 5
umass0: using ATAPI over CBI
umass0: at uhub2 port 2 (addr 5) disconnected
uvm_fault(0xc0472e40, 0x0, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 eip c0359fb3 cs 8 eflags 10287 cr2 8 cpl c0000000
panic: trap
syncing disks... done

c0359f40 T usbd_get_interface_altindex
c0359f4c T usbd_get_interface
c0359f98 t usbd_ar_pipe              <---
c0359fd0 T usb_transfer_complete
c035a128 T usb_insert_transfer
c035a18c t usbd_start_next

c0472e40 B vmspace0

(I had no wd* configured on umass0, so I couldn't try it out - but when
I disconnected the camera, the system paniced.)

  -jm