Description of problem:

2.6.16-1.2134_FC6 fails to boot on a Powerbook 667. Last known good kernel was
2.6.15-1.2054_FC6.

Version-Release number of selected component (if applicable):

2.6.16-1.2134_FC6, also applies to another recent 2.6.16-1 Fedora kernel
(perhaps all 2.6.16 kernels?).

How reproducible:

100%

Steps to Reproduce:
1. Boot kernel
2. Machine hangs
  
Actual results:

Dead box

Expected results:

Not dead box

Additional info:

Fails somewhere after time_init (last output on console, then two blank lines,
no oops or other useful diagnostics). Can help debug later if needed.