Pagefault in BETA7 with ifconfig

I noticed this in BETA6 just before I upgraded to BETA7.  I have a
Dell Inspiron 1150 laptop with a bfe ethernet interface.  It is
getting it's IP via DHCP and I don't have any other special options
set via rc.conf

If I issue these two commands:
#sudo ifconfig bfe0 down
#sudo ifconfig bfe0 up

I get the following message:

Fatal trap 12: page fault while in kernel mode
fault virtual address    = 0xb
fault code               = supervisor read, page not present
instruction pointer      = 0x8:0xc0607a08
stack pointer            = 0x10:0xe7d2bb18
frame pointer            = 0x10:0xe7d2bb20
code segment             = base 0x0, limit 0xfffff, type 0x1b
                         = DPL 0, pres 1, def32 1, gran 1
processor eflags         = interrupt enabled, resume, IOPL = 0
current process          = 498 (ifconfig)
trap number              = 12
panic: page fault
uptime: 49s

Is this a known issue?  I thought I remember seeing something on the
todo list, but I don't see it anymore.