Well this is embarrassing...

It's a bit difficult to identify the pin number from your photo but you should be able to using the diagram below (I think the pinouts are the same for DDR3 modules). There should be some pin numbers either on the DIMM itself or on the motherboard. Check very carefully that the heat spreader is not somehow shorting against the blackened pad. If you have a multimeter you should be able to check for a short circuit between the blackened pad and Vss or Vdd, VddQ etc. (don't overdo the testing though as you could damage the ram chips). The point of contact between the DIMM socket and the DIMM pad would have the largest resistance along the short circuit which is presumably why the pad has oxidised. Check that the corresponding pin in the DIMM socket on the MB has not been damaged due to the short circuit as this could prevent good contact from being made with a different DIMM.
http://www.allpinouts.org/index.php/DDR2_SDRAM_DIMM_240_pin

EDIT: Maybe you should first e-mail those pics to Corsair to get their opinion. It appears that the blackened pad is actually connected to Vss (GND) like many others (2,8,11,14,17,20,23,26,29 etc.) so I'm not sure why only this particular pad is being damaged. Was the uninsulated extra support pillar located anywhere near the DIMM sockets? I personally wouldn't replace the DIMM until I had feedback from Corsair in case the motherboard is faulty and it destroys something else.

Once again many, many thanks for the DIMMS. They arrived the following day, securely packed in bubbles and have been installed and tested successfully and are currently in use.
 
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It's a bit difficult to identify the pin number from your photo but you should be able to using the diagram below (I think the pinouts are the same for DDR3 modules). There should be some pin numbers either on the DIMM itself or on the motherboard. Check very carefully that the heat spreader is not somehow shorting against the blackened pad. If you have a multimeter you should be able to check for a short circuit between the blackened pad and Vss or Vdd, VddQ etc. (don't overdo the testing though as you could damage the ram chips). The point of contact between the DIMM socket and the DIMM pad would have the largest resistance along the short circuit which is presumably why the pad has oxidised. Check that the corresponding pin in the DIMM socket on the MB has not been damaged due to the short circuit as this could prevent good contact from being made with a different DIMM.
http://www.allpinouts.org/index.php/DDR2_SDRAM_DIMM_240_pin

EDIT: Maybe you should first e-mail those pics to Corsair to get their opinion. It appears that the blackened pad is actually connected to Vss (GND) like many others (2,8,11,14,17,20,23,26,29 etc.) so I'm not sure why only this particular pad is being damaged. Was the uninsulated extra support pillar located anywhere near the DIMM sockets? I personally wouldn't replace the DIMM until I had feedback from Corsair in case the motherboard is faulty and it destroys something else.

Once again many, many thanks for the DIMMS. They arrived the following day, securely packed in bubbles and have been installed and tested successfully and are currently in use.

Thanks for the advice. I've been studying for my exams this weekend so haven't tried any of the above post's suggestions but will get around to doing it today hopefully.

I think it is safe to replace the RAM as it wouldn't cost me anything due to the lifetime warranty and if it is the board which is causing the problems, I'm sure it wouldn't be a problem if it blows another DIMM as both are from the same people.

It is only a pleasure for the DIMMS :)
 
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