just installed the 1.5.1 BETA onto a sparc2 with weitek PowerUP CPU thinger.
issued a reboot, and that machine paniced with:

# reboot
Terminated
Back in microroot; halting machine...
panic: init died (signal 0, exit 0)
syncing disks... done              
Frame pointer is at 0xf1c7fca8
Call traceback:               
  pc = 0xf01143bc  args = (0x900000e5, 0x90000fe5, 0x0, 0xf0166800, 0xf1c7fdc0, 0x909000e5, 0xf1c7fd10) fp = 0xf1c7fd10
  pc = 0xf0046b40  args = (0x100, 0x0, 0xf0227c00, 0xf1c80000, 0xffffffff, 0x2710, 0xf1c7fd78) fp = 0xf1c7fd78
  pc = 0xf00361a4  args = (0xf012eb58, 0x100, 0x0, 0xf1c7e000, 0x0, 0x3e8, 0xf1c7fde0) fp = 0xf1c7fde0
  pc = 0xf003616c  args = (0xf1c80000, 0x0, 0x1000, 0xf0002000, 0x0, 0x0, 0xf1c7fe58) fp = 0xf1c7fe58
  pc = 0xf0122358  args = (0xf1c80000, 0xf1c7ff28, 0xf1c7ff20, 0xf0036160, 0x0, 0xf1c7ffb0, 0xf1c7fec0) fp = 0xf1c7fec0
  pc = 0xf00087b0  args = (0x1, 0xf1c7ffb0, 0x75948, 0xeffffa18, 0x0, 0xf1c7ffb0, 0xf1c7ff50) fp = 0xf1c7ff50
  pc = 0x183e0  args = (0x0, 0xeffffa34, 0x2, 0xf0002000, 0xe0000000, 0x0, 0xeffff9d0) fp = 0xeffff9d0
                      
dump to dev 5,1 not possible
rebooting                   

it then proceeds to boot up just fine after it resets itself.

seems to work just fine though after it booted.  odd.

-brian