It's a little late, but the generic-24 kernel doesn't boot on my 
PowerBook 145B.

There's a lot of clabber about every partition on the SCSI drives 
that doesn't happen with the 1.4.2 generic kernel:

could not mode sense (4/5); using fictitious geometry

The boot process gets through reading the time from PRAM, notes that 
it doesn't seem to be accurate, identifies the root file system type 
(ffs), and then

panic:  cnopen:  cn_tab->cn_dev == NODEV

stopped in init at   _cpu_debugger+0x6  unlk  a6
db>

at which point I can reboot OK and go back in to the MacOS.  There's 
other options, of course, but I don't know what to do with them 
(serious newbie-ness here).