These may sound like questions that have been asked before but:
have you tested using memtest86+?
Have you tried the option to scan all memory, instead of just testing what the bios reports?
Have you checked your hard drive smartctl reports?
Have you opened your case and checked for bulging/leaking capacitos on the motherboard?
These may sound strange, but many hardware faults will cause mysterious crashes that only manifest when the system load is cranked up and you have to eliminate these as a cause of system lockups before blaming a userspace program.
tried the memory scan, no problems
how do i check then hdd smartctl reports?
hardware looks fine?
NOTE: the first few times it happened it always occured on the same file
when it happened the first time it was after hasing about 30 other files
the second time it occured on the second file
each time when i removed the suspect files it worked flawlessly
this hardly sound like a hardware issue
i also tried emilinating cranking up the system load
now it simply crashes while downloading a few files and not sharing anything else
i've cranked the system by doing the following at once
1. compling
2. md5hasing all files
3. moving files
4. running a benchmark program