MacOSX Fatal Error on Cog's quit - Playing MP3 from a external USB HD

Hello guys,

This is my setup:
- iMac G5 PPC
- Mac Mini Intel Core Duo 2 1.83Ghz
- External 500GB HDD IDE using USB 2.0

How I work:
- I work in the iMac
- The external HDD is plugged using USB2.0 in my Mac Mini
- The Mac Mini and the iMac are both plugged to a 3com hub
- Both "speak to each other" perfectly
- From the iMac, and through the network, I write and read with no problem in the 500GB HDD (plugged on the Mini)

The bug:
- In the iMac I can perfectly load and play any MP3 or Playlists from the MacMini external HDD, but when I "COMMAND + QUIT" Cog, my iMac freezes and present that most deadly error of all time, the "official Apple" Mac OS X panic/error screen (the one with several languages).
- I was using the 0.07 r909 and I did update to 0.07 r911, but the bug persist.
- I tried SEVERAL times and it EVER happens.
- I tried the same on the Cog in the MacMini (r909) and it works perfectly. Looks like there is some kind of problem in the network transaction between my cog and the external MacMini HD.

Descriptive info and logs of the last occurence:

Model: PowerMac8,2, BootROM 5.2.5f1, 1 processor, PowerPC G5  (3.1), 2 GHz, 1.5 GB
Graphics: kHW_ATIrv351Item, ATY,RV351, spdisplays_agp_device, 128 MB
Memory Module: DIMM0/J4000, 512 MB, DDR SDRAM, PC3200U-30330
Memory Module: DIMM1/J4001, 1 GB, DDR SDRAM, PC3200U-30330
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x4318), Broadcom BCM43xx 1.0 (4.170.25.8)
Modem: Jump, V.92, Version 1.0
Bluetooth: Version 2.1.0f17, 2 service, 1 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Serial ATA Device: WDC WD2500JD-40HBC0, 232.89 GB
Parallel ATA Device: MATSHITADVD-R   UJ-845
USB Device: Keyboard Hub, Apple, Inc., high_speed, 500 mA
USB Device: Optical USB Mouse, Logitech, low_speed, 100 mA
USB Device: Apple Keyboard, Apple, Inc, low_speed, 100 mA
USB Device: Bluetooth USB Host Controller, Apple, Inc., full_speed, 500 mA

Wed Oct 29 21:44:15 2008

Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x0000000000000008 PC=0x0000000000299754
Latest crash info for cpu 0:
   Exception state (sv=0x2a162280)
      PC=0x00299754; MSR=0x00009030; DAR=0x00000008; DSISR=0x40000000; LR=0x007C6264; R1=0x326F6EA0; XCP=0x0000000C (0x300 - Data access)
      Backtrace:
0x007C61B8 0x002CEDE8 0x002E2E80 0x326CA5D4 0x326CB248 0x002CEE88
         0x002E2E80 0x3280DAB0 0x3280E170 0x3280EFA0 0x3281D30C 0x32821890 0x00108D10 0x00100550
         0x00101438 0x00289998 0x00289B10 0x002931D8 0x0003D038 0x0003EA90 0x0003E908 0x000279EC
         0x000B2F58 0x0030ABDC 0x000B2CC8 0x00000000
         backtrace terminated - frame not mapped or invalid: 0xBFFFE630

      Kernel loadable modules in backtrace (with dependencies):
         com.apple.filesystems.afpfs(8.5.7)@0x327ff000->0x3284cfff
         com.apple.nke.asp_tcp(4.6.2)@0x326c7000->0x326d1fff
         at.obdev.nke.LittleSnitch(2.0.10)@0x7bd000->0x7e2fff
Proceeding back via exception chain:
   Exception state (sv=0x2a162280)
      previously dumped as "Latest" state. skipping...
   Exception state (sv=0x326e6c80)
      PC=0x93160DBC; MSR=0x0000D030; DAR=0x326A4000; DSISR=0x42000000; LR=0x918E1BC0; R1=0xBFFFE630; XCP=0x00000030 (0xC00 - System call)

BSD process name corresponding to current thread: Cog

Mac OS version:
9F33

Kernel version:
Darwin Kernel Version 9.5.0: Wed Sep  3 11:31:44 PDT 2008; root:xnu-1228.7.58~1/RELEASE_PPC
System model name: PowerMac8,2
panic(cpu 0 caller 0xFFFF0003): 0x300 - Data access
Latest stack backtrace for cpu 0:
      Backtrace:
         0x0009B518 0x0009BEBC 0x00029DD8 0x000AF290 0x000B2AF8
Proceeding back via exception chain:
   Exception state (sv=0x2a162280)
      PC=0x00299754; MSR=0x00009030; DAR=0x00000008; DSISR=0x40000000; LR=0x007C6264; R1=0x326F6EA0; XCP=0x0000000C (0x300 - Data access)
      Backtrace:
0x007C61B8 0x002CEDE8 0x002E2E80 0x326CA5D4 0x326CB248 0x002CEE88
         0x002E2E80 0x3280DAB0 0x3280E170 0x3280EFA0 0x3281D30C 0x32821890 0x00108D10 0x00100550
         0x00101438 0x00289998 0x00289B10 0x002931D8 0x0003D038 0x0003EA90 0x0003E908 0x000279EC
         0x000B2F58 0x0030ABDC 0x000B2CC8 0x00000000
         backtrace terminated - frame not mapped or invalid: 0xBFFFE630

      Kernel loadable modules in backtrace (with dependencies):
     

Thanks for your attention!
Cospefogo.