Cold Start freeze and sleep freeze
I have the same problem. The problem is if the machine is cold (10 celcius o 50 Fahrenheit ambient). If machine is hot, the problem is some times if networks change, for example, another IP for Airport or Airport to Ethernet, then the machine freezes or get Kernel Panic.
If I start (not sleep) with cold ambient (10 celcius ambient or less), Freeze is for sure. Freeze occurs before login panel or at login panel
If I start in safe mode (cold machine), I can log in, and if I wait for 5 minutes I can restart without a Freeze,
If I start in safe mode (cold machine), but if I restart immediately in normal mode, freeze is for sure.
PowerBook 1.33
Panther 10.3.6
Note: Excuse my bad English