2007.11 issue - boots only from the boot menu

[Shawn Rutledge]

After flashing everything from the 2007.11 release (new u-boot, kernel
and rootfs), I'm seeing this behavior: if I just hold down the power
button and let it boot, it sits with the initial logo screen
indefinitely, and usbnet doesn't connect (so it's hard to tell how far
it got).  However if I hold down aux and turn it on, then select
"boot" from the menu, it boots completely into X and everything seems
to work.

I tried erasing rootfs and reflashing both the kernel and rootfs just
to be sure.  Checked the md5sums too.