I had the same problem with a IIci. I had been running with 1.4.2, and did
a completely new install of 1.5 on a new drive I had picked up, and it
would not boot until I removed the mouse.

Eric Feldhusen

> I'm doing a sysinstall of 1.5 on a Q650/Q800, and I can't boot the kernel

> if I don't unplug the mouse after selection "boot" from the MacOS NetBSD
> Booter.