Thanks a lot! The poor performance with donation on was my fault initially I've since fixed it but it doesn't matter. I haven't made a decision about enabling donations by default but for now it's not a high priority issue.

If you successfully close cgminer properly it *should* return to the default values on shutdown. That said, the windows version has this knack of not closing properly. How/why, remains a mystery. Nonetheless the settings will go back to default on a reboot. None of the settings cgminer uses tell the card to keep settings across a reboot.