Quote - This is a strange one i've not had before...

Carrara's been acting up, simply exiting to desktop without warning while in a mid-render. Its not even bothering with the Memory Allocation Error messages anymore. I did a fresh reboot, emptied the DazTmp folder after every crash, C6's Disk Spool set at 200mb,  exited my Antivirus & firewall apps, and any other process that wasn't required, in result Windows & system Memory usage at 268mb...

Now, this particular scene, I was able by fluke - get a 1680x1050 render but it was in avi format frame 1 / 96... but after that, I could nolonger get anything more than 840x525 without crashing. Believe me, I've had way more populated & resource intensive scenes done before at full resolution...

The scene setup in the assembly room: i440.photobucket.com/albums/qq129/TerrasJadeonar/Glitches%20and%20Issues/Glitchscenesetup.jpg

The Render artifacts / Progress Statistics Tab:
Notice the 2 render tiles (@ 128) where i'm getting some digital  garbage in those  tiles. Total surface area size 1.71gb  i440.photobucket.com/albums/qq129/TerrasJadeonar/Glitches%20and%20Issues/Glitchtab3.jpg

Looks like i goofed up on the other screenshot, overwrote it... Was going to paste one with system temps.  

AA Good
Accuracy 2 Pixels
Shadow Accuracy 2 pixels

Global Illumination:
Sky 100%
Indirect Lighting 100%
Interpolation 20%
Photons 5000
Photon accuracy 10%
Lighting quality: fast
Accuracy 16px
Tiles: 128

Basic System Setup:
Core2Quad Q6600
Thermalrite Ultra120 Extreme Heatsink / 120mm Panaflow fan
2gb Ram, XP Pro
Coolermaster 620HX PSU, CM Stacker 800 case
Carrara 6.2.1

CPU temps - range for all 4 cores via CPUID Hardware Monitor
Min 39C  (102F),  Current 40C (103F) - 42C (107F),  Max 54C (129F)

Final render: "Maximum Ninja: 820x525, indirect light 140%, Tile size 32: www.renderosity.com/mod/gallery/index.php

Your memory is very skimpy, Windows uses at least 600mb-that doesn't leave much for Carrara.
I tested a scene for a forum member at Daz, it was only about 500mb when loaded, but Carrara used 2.3gb on my Windows XP 64 with LAA enabled and 8gb memory, when loading it and then went back down to 500mb. It looks like carrara can use a lot of memory to do all of its internal things.