The MFB driver in the miniroot should be the same as in -current.
(I updated the miniroot with kernels that boot on mips3 machines about
sometime in the last two months, which is well after any mfb changes.)

Could someone with a working MFB setup __please__ boot the kernel
image from the latest snapshot on ftp.netbsd.org and let me know if it
works or not?  It would be *really* helpful to get that confirmed one
way or the other in the next 5 days.