Get a kernel panic when Classic support begins loading on G-5

I get a kernal panic when about 2/3 of Classic supports begins loading on G-5. Now running OS 10.4.11. Panis is resolved by hard shut-down/reboot using front button. Occaasionall a seconmd panic occurs. only once in 6 monbths has a 3rd panic in a row happened. Attaching incomprehensible panic log:

Wed Oct 9 12:41:07 2013

Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x00000000ED010024 PC=0x000000000003FFD4

Latest crash info for cpu 0:

Exception state (sv=0x3A52BA00)

PC=0x0003FFD4; MSR=0x00009030; DAR=0xED010024; DSISR=0x40000000; LR=0x0003FFBC; R1=0x22083A80; XCP=0x0000000C (0x300 - Data access)

Backtrace:

0x00000000 0x0002BDCC 0x002B1B68 0x002DD0FC 0x002DD2A4 0x0097BB30

0x0096F9C0 0x002EC884 0x0008CA28 0x00029234 0x000233F8 0x000ABEAC 0x029CB8A0

backtrace terminated - frame not mapped or invalid: 0xBFFFD060

Kernel loadable modules in backtrace (with dependencies):

com.apple.GeForce(4.1.8)@0x962000

dependency: com.apple.iokit.IOPCIFamily(1.7)@0x48d000

dependency: com.apple.iokit.IOGraphicsFamily(1.4.2)@0x616000

dependency: com.apple.iokit.IONDRVSupport(1.4.2)@0x63a000

dependency: com.apple.NVDAResman(4.1.8)@0x650000

Proceeding back via exception chain:

Exception state (sv=0x3A52BA00)

previously dumped as "Latest" state. skipping...

Exception state (sv=0x3212A280)

PC=0x9000AF48; MSR=0x0200F030; DAR=0xB8DD0000; DSISR=0x40000000; LR=0x9000AE9C; R1=0xBFFFD060; XCP=0x00000030 (0xC00 -

Get a kernal panic during classic support loading. About 2/3 loads, then crashes. Resolved by hard reboot w/power button.Occasionally happens twice in a row and only once in 3 months has it occurred 3 times in a row. At this point its an annoyance but worried that it may become a real problem .OS 10.4.11 on a ppc G-5. Incomprehensible panic log attached. Console (panic) log also available if req'd. Thanks for any tips-

Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x00000000ED010024 PC=0x000000000003FFD4

Latest crash info for cpu 0:

Exception state (sv=0x3A52BA00)

PC=0x0003FFD4; MSR=0x00009030; DAR=0xED010024; DSISR=0x40000000; LR=0x0003FFBC; R1=0x22083A80; XCP=0x0000000C (0x300 - Data access)

Backtrace:

0x00000000 0x0002BDCC 0x002B1B68 0x002DD0FC 0x002DD2A4 0x0097BB30

0x0096F9C0 0x002EC884 0x0008CA28 0x00029234 0x000233F8 0x000ABEAC 0x029CB8A0

backtrace terminated - frame not mapped or invalid: 0xBFFFD060

Kernel loadable modules in backtrace (with dependencies):

com.apple.GeForce(4.1.8)@0x962000

dependency: com.apple.iokit.IOPCIFamily(1.7)@0x48d000

dependency: com.apple.iokit.IOGraphicsFamily(1.4.2)@0x616000

dependency: com.apple.iokit.IONDRVSupport(1.4.2)@0x63a000

dependency: com.apple.NVDAResman(4.1.8)@0x650000

Proceeding back via exception chain:

Exception state (sv=0x3A52BA00)

previously dumped as "Latest" state. skipping...

Exception state (sv=0x3212A280)

PC=0x9000AF48; MSR=0x0200F030; DAR=0xB8DD0000; DSISR=0x40000000; LR=0x9000AE9C; R1=0xBFFFD060; XCP=0x00000030 (0xC00 - System call)

System call)

Kernel version:

Darwin Kernel Version 8.11.0: Wed Oct 10 18:26:00 PDT 2007; root:xnu-792.24.17~1/RELEASE_PPC

panic(cpu 0 caller 0xFFFF0003): copyin/out has no recovery point

Latest stack backtrace for cpu 0:

Backtrace:

0x000954F8 0x00095A10 0x00026898 0x000A8204 0x000ABB80

Proceeding back via exception chain:

Exception state (sv=0x3A52BA00)

PC=0x0003FFD4; MSR=0x00009030; DAR=0xED010024; DSISR=0x40000000; LR=0x0003FFBC; R1=0x22083A80; XCP=0x0000000C (0x300 - Data access)

Backtrace:

0x00000000 0x0002BDCC 0x002B1B68 0x002DD0FC 0x002DD2A4 0x0097BB30

0x0096F9C0 0x002EC884 0x0008CA28 0x00029234 0x000233F8 0x000ABEAC 0x029CB8A0

backtrace terminated - frame not mapped or invalid: 0xBFFFD060

Kernel loadable modules in backtrace (with dependencies):

com.apple.GeForce(4.1.8)@0x962000

dependency: com.apple.iokit.IOPCIFamily(1.7)@0x48d000

dependency: com.apple.iokit.IOGraphicsFamily(1.4.2)@0x616000

dependency: com.apple.iokit.IONDRVSupport(1.4.2)@0x63a000

dependency: com.apple.NVDAResman(4.1.0

*********