In general, when rolling forward to a new baselevel of -current,
especialy if you haven't been tracking it on a day-by-day basis, it's
best to:

 a) build & install src/usr.sbin/config
 b) re-run config
 c) rebuild the kernel
 d) reboot the newly-built kernel
 e) do a "make build" to build user space.

If you do "e" first, the newly built userspace will often depend on
new system calls or new features of old system calls.

New kernels generally run old binaries; old kernels tend not to run
new binaries..

					- Bill