I'm not the only one with this issue.
i have a same problem here, one of the miner just cannot mine in eligius pool, although i can see its speed is 1000G locally, it seems like the local time shown in miner is wrong and maybe the problem
Quoted from:
https://bitcointalk.org/index.php?topic=514758.msg6157919#msg6157919Any ideas Wiz or Luke?