Every time I leave my G5 crunching away on BOINC, I come back to find it frozen with a kernel panic with the fans on full blast. I have the log information, can anyone look at it and give me a reason?

Sun Dec 30 19:12:26 2007
panic(cpu 1 caller 0x00042434): "wait queue deadlock - wq=0x4ebc8c, cpu=1\\n"@/SourceCache/xnu/xnu-1228.0.2/osfmk/kern/wait_queue.h:169
Latest stack backtrace for cpu 1:
Backtrace:
0x0009AD18 0x0009B6BC 0x00029DC4 0x00042434 0x000EC0F4 0x000F0914 0x000F6420 0x000F64D4
0x003091FC 0x000B24C8 0x00000000
Proceeding back via exception chain:
Exception state (sv=0x63921500)
PC=0x92412BD8; MSR=0x0200F030; DAR=0xE2E1ABB4; DSISR=0x40000000; LR=0x92D1F0CC; R1=0xBFFFC5E0; XCP=0x00000030 (0xC00 - System call)

BSD process name corresponding to current thread: mdworker

Mac OS version:
9B18

Kernel version:
Darwin Kernel Version 9.1.0: Wed Oct 31 17:48:21 PDT 2007; root:xnu-1228.0.2~1/RELEASE_PPC
@

I reccommend to verify your hardware with the diag tools from the apple CD, rembler (memory test) and prime95 (stress test).
How ofter did the system crash ?

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