you think it is not a blakecoin or cgminer256 issue?
i will try reaper although i don't like it at all
i haven't any issue of this kind with other coins in the past!
These are my real world results I know others have had better luck solo with cgminer but I can only test my rigs
Blakecoin wallet + any cgminer using GPU has issues on my rigs was very difficult to get working 24/7
Blakecoin wallet + cgminer using more than 16 FPGA's per wallet has issues on my rigs, stable setting: 2x cgminer with 8 FPGA's each per wallet is stable 24/7
Blakecoin wallet + Reaper no issues it is very plain but I need to set the window properties for screen buffer width/window size width to 110 so it stops scrolling
0.8.9 was updated with the improvements from Bitcoin 0.8.6, I will look for ways to improve stability and compatibility it is just an ongoing process
Edit:
18 days is my longest run with reaper(closed due to wallet change)
3 days was my longest run with cgminer/GPU (just was not stable locking wallet or rig)
10 days with cgminer/FPGA(closed due to version update)
cgminer on the pool is stable more than the pool sometimes
kramble's python FPGA miner is rock solid never had an issue with it