Thanks for help , I tried everything and finally  I managed to login after  did not enter any password ....Strange site is pool.gridcoin , no password reset , no e-mail , no support,  nothing.

Hm Is there a problem with http://pool.gridcoin.us/ , from morning i cannot login , always gives me  "Login failed"

And 10x more OpenCL developers , some of which seem to have a full-time to make miners

nope , this will only make people  to replace with AMD video cards and use free OpenCL software.
4 years ago when BTC cost $1 had one paid CUDA miner , against him there were 4 free OpenCL miner with much much high speed.This not working.

Winx64 pro
GTX460 768MB @730MHz
18.12.13        02.02.14
120KHash/s    110KHash/s

GTX660 2GB@+60MHz
18.12.13        02.02.14
180KHash/s    215KHash/s - -C 2 -m 1 -i 0 -l Y5x32 -L 1

And autotune not working at all.I use "-l" from 18.12.2013/14.01.2014 build.

after 3 days  finally managed to compile for Windows 7 .Ubuntu compile is  much easy.

https://mega.co.nz/#!70YlWBrQ!AY870Uc4d93Avr58K-J-10AlaeJkJj27gT-ZW0rSZQ0  absolutely no guarantee 

I use these settings for maximum speed  -aggression=8 -gpugrid=256 -gputhreads=512

Unfortunately we will not see  optimized CUDA miner as OpenCL

GTX460@800MHz
rpcminer-cuda 70Mhash/s

phoenix or poclbm gives 59Mhash/s

Some chance to see the version of the Cuda miner