I have been getting an odd error with the latest version 2014-02-18

It doesn't happen right away, but after a few hours of running.

I have reverted to cudaminer-2013-12-18 which doesn't exhibit this issue.

For both versions I am using x64 version.
My full system detail
https://drive.google.com/file/d/0B5cEvOA-L4zcd3dXN1R1Z1Biak0/edit?usp=sharing

I run via a bat file that just says:
cudaminer.exe -o stratum+tcp://middlecoin.com:3333 -u USERNAME -p x