Kernel modules: DF versus FBSD?

[walt]

I've been using the DFly boot loader to boot FBSD-current
because our loader will work correctly with extended/logical
partitions -- and FBSD wasn't interested in fixing theirs
when I pointed them to our loader patches.
Well, recently FBSD made some kind of a change which stops
our boot loader from loading their kernel modules -- I have
no idea what causes the problem.  Anyone here know what the
difference might be?
Thanks!