What drivers do you use (AMD)? I have been using 13.12 and I'm wondering is it possible to update to the newest version without problems with mining?
I wouldn't. I tried and it stopped compiling the OpenCL code properly and hashrate went way down if it even worked at all and didn't give strictly HW errors.
Thanks Thirtybird, I don't have to check it on my own skin

Maybe we can put this kind of information on the first page of this thread or on our main page in mining section. Also someone should update
http://ultracoin.net/mining.html nitro and UTC PoolPW are down.