I've a few messages like this recently

25/05/2009 10:09:45 Enigma@Home Message from server: Completed result awgly100_0_6391514_r0_0 refused: result already reported as success
25/05/2009 10:09:45 Enigma@Home Message from server: Completed result awgly100_0_6393433_r0_0 refused: result already reported as success
25/05/2009 10:09:45 Enigma@Home Message from server: Resent lost result hceyz72_0_6414736_r0_0


and recently one of my tasks has reported as Aborted by Project?

I've switched the optimised app and that erroed the two work units i was working on at the time but has not had an problems since?