Kernel Panic in account with parental controls

Hello,

We were getting frequent kernel panics when my daughter was logged in to her account, on which parental controls are enabled.  (10.4.11).  Here is an excerpt from the panic.log:

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Tue Mar 29 00:16:13 2011


Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x000000000000007C PC=0x00000000000FA52C
Latest crash info for cpu 0:
   Exception state (sv=0x27C95A00)
      PC=0x000FA52C; MSR=0x00009030; DAR=0x0000007C; DSISR=0x40000000; LR=0x000FACD0; R1=0x121D3AB0; XCP=0x0000000C (0x300 - Data access)
      Backtrace:
0x00000000 0x3523B794 0x00264194 0x00292520 0x00297790 0x00297964
         0x002ABDB8 0x000ABD30 0x00019D00
      Kernel loadable modules in backtrace (with dependencies):
         com.sophos.kext.sav(7.2.0)@0x3523a000
Proceeding back via exception chain:
   Exception state (sv=0x27C95A00)
      previously dumped as "Latest" state. skipping...
   Exception state (sv=0x35471A00)
      PC=0x900201A0; MSR=0x0000D030; DAR=0x901CE620; DSISR=0x40000000; LR=0x0000BBE0; R1=0xF0080410; XCP=0x00000030 (0xC00 - 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): 0x300 - Data access
Latest stack backtrace for cpu 0:
      Backtrace:
         0x000954F8 0x00095A10 0x00026898 0x000A8204 0x000ABB80
Proceeding back via exception chain:
   Exception state (sv=0x27C95A00)
      PC=0x000FA52C; MSR=0x00009030; DAR=0x0000007C; DSISR=0x40000000; LR=0x000FACD0; R1=0x121D3AB0; XCP=0x0000000C (0x300 - Data access)
      Backtrace:
0x00000000 0x3523B794 0x00264194 0x00292520 0x00297790 0x00297964
         0x002ABDB8 0x000ABD30 0x00019D00
      Kernel loadable modules in backtrace (with dependencies):
         com.sophos.kext.sav(7.2.0)@0x3523a000
   Exception state (sv=0x35471A00)
      PC=0x900201A0; MSR=0x0000D030; DAR=0x901CE620; DSISR=0x40000000; LR=0x0000BBE0; R1=0xF0080410; XCP=0x00000030 (0xC00 - 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

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When I looked at parental controls for that user, I saw that Applications>Sophos Anti-Virus was not checked, so I checked it, and we haven't seen any more kernel panics so far.

Did I do this correctly?  Does a user account with parental controls (on applications) enabled have to have that box checked for Sophos to work for that user?

Thanks,

Mark