Interesting... You are saying this is front end and you use POCLBM miner... Not familiar with that one... I notice that hashrate gui vs cgminer is +10% if you use cgminer... What is POCLBM like?

EDIT: What about automatic backup addresses and pools? stratum.bitcoin.cz:3333, stratum2.bitcoin.cz:3333, stratum3.bitcoin.cz:3333, getwork.bitcoin.cz:8332...

EDIT: getwork.bitcoin.cz:8332 is api.bitcoin.cz:8332 It is getwork protocol but address is diffident...