Kernel panic - corrupt stack

Question

My iBook g4 has a kernel panic (below text).
It did a '3 beeb, flash light 5 times' crash last week but then re-booted fine. About 4 months ago, this happened repeatedly and the 'power down now' error message appeared on a black screen. Finally it refused to boot up at all and we took it apart and found a loose connection inside (I don't know what it was), reattached it and it has worked fine since.
Am worried as I have stupidly not backed up recently and have a website on there that is due to posted. Please help!
<start>
System failure: cpu=0; code=00000001 (Corrupt stack)
Latest crash info for cpu 0:
Exception state (sv=0x19DC1000)
PC=0x000940A0; MSR0x00001030; DAR=0x00000000; DSIR=0x42000000; LR=0x00093F8C; R1=0xFFFFFEE0; XCP=0x00000098 (System failure)
Backtrace:
backtrace terminated - frame not mapped or invalid: 0xFFFFFEE0
Proceeding back via exemption chain:
Exception state (sv0x19DC1000)
PC=0x00094160; MSR=0x00001030; DAR=0x00000000; DSISR=0x42000000; LR=0x0009413C; R1=0x00000000; XCP=0x00000000C (0x300 - Data access)
Exception state (sv0x19B6CC80)
PC=0x90026BC8; MSR=0x0200F030; DAR=0x003B7018; DSISR=0x42000000; LR=0x90008DC0; R1=0xBFFFEB40; XCP=0x000000030 (0xC00 - System call)
Kernel version:
Darwin kernel version 7.9.0:
Wed Mar 30 28:11:17 PST 2005; root:xnu/xnu-517.12.7.obj-1/RELEASE_PPC
Memory access exception (1,0,0)
ethernet MAC address: 00:00:00:00:00:00
ip address: 0.0.0.0
Waiting for remote debugger connection
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iBook G4   Mac OS X (10.4.10)  

Answer 1

First, sorry for the delay, I only work a few days a week
Second, there is no panic.log on any of the machines. I looked in the console and system profiler programs in all the directories and searched in terminal using 'find / -name panic.log 2> /dev/null'. That is one reason I had to take a picture of it. I will try hard to get a panic.log.
Keep in mind that these are very hard lockups so I am wondering if the kernel even CAN sync the log to disk in this situation. However, I come from the Linux world and am fairly new to Macs so perhaps I am expecting it to be a hardware problem when software really can make a Mac Kernel lockup.
Furthermore they are networked together, we use LDAP/NFS home directories but each machine was prepared with it's own local copy of CS2. There is no sharing of the application.
Also, i tried a boot with apple-v but all went well and there were no out of place message.
Since my first posting I have also tried an fsck which revealed nothing but a clean FS.
Also, we do use radmind to help clone machines. The OS was installed manually with our application loaded using radmind templates.
We do use our Macs very heavily and use many applications at once using all RAM and heavy swap. Do the Mac Minis not like to be exercised hard? I think I may try to use a 1GB stick in a machine and see if that helps.
Also, could CS2 really cause a complete lockup of the machine with a corrupt stack? To me an application-level program should never cause the machine to freeze or should never be able to corrupt memory it doesnt own unless the OS lets it meddle with hardware.