I decided to jump to the latest from 1.6Y and my machine wedges at boot, 
keyboard unresponsive, no debugger, no three finger salute. Had to power 
cycle. The last screen full of text is:

cpu1: starting
cpu1: Intel Pentium Pro (686-class), 199.31 MHz, id 0x617
cpu1: features fbff...
...
mpbios: bus 0 is type PCI
mpbios: bus 1 is type PCI
mpbios: bus 9 is type ISA
ioapic0 at mainbus0 apid 2 (I/O APIC)
ioapic0: pa 0xfec00000, version 11, 24 pins
ioapic0: misconfigured as apic 0
ioapic0: remapped to apic 2
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space , memory space enabled, rd/line, rd/mult, wr/inv ok
pchb0 at pci0 dev 0 function 0
pchb0: Intel 82441FX PCI and Memory Controller (PMC) (rev. 0x02)
ppb0 at pci0 dev 8 function 0: IBM 82351 PCI-PCI brdige (rev. 0x01)
pci1 at ppb0 bus 1 
pci1: i/o space, memory space enabled, rd/line, wr/inv ok
esiop0 at pci1 dev 4 function 0: Symbios Logic 53c875 (Ultra-wide scsi)
esiop0: using on-board RAM
(newline)

and that's all she wrote.

-- 

The nice thing about Windows is - It does not just crash, it displays a
dialog box and lets you press 'OK' first.
						-- Arno Schaefer