Ok, got the new GUIMiner installed, with both good and bad results...
The good, my shares on BTC Guild are being accepted again...
The bad, when solo mining when BTCG is down, I'm only getting ~400khash/s when I typically get the same 85-90Mhash/s per card for both BTCG mining and solo mining, with the old version.
Did something get changed with solo mining, where it is ignoring my card choice, and is CPU mining instead?
It would certainly explain why my BTCG miners on core #3 are processor friendly, while my Solo miners on core #4, are perpetually at 100% still...
-- Smoov