Was that around June 14th? Thats when the maximumpps shorting system was implemented.
maybe if you link to your stats page it will be easier to research, like this:
http://eligius.st/~artefact2/blocks/1QEkXwhhHbaBCfmEHY7bh8QNPVkFtorQkK
Now for that address, you can see the maximum pps shorting did it's job during these rounds:
1h2m   4s   3,338/145,196=   2.2990 %   0.29390580 BTC (should be 1.1495)
16m43s   854/39,560=   2.1587 %   0.07508482 BTC (1.07935)
3h22m34s   5,498/470,841=   1.1677 %   0.48443702 BTC (.58385)
1h38m18s   5,022/239,107=   2.1003 %   0.44257700 BTC (1.05015)
29m49s   1,578/72,605=   2.1734 %   0.13906552 BTC (1.0867)
1h23m24s   3,817/176,193=   2.1664 %   0.33638325 BTC (1.0832)
For a total shorting of around 4BTC which wasn't made up for (by even .01BTC) in the longer round below that awarded the expected amounts of 50 BTC * % contributed:
4h   34m   14s no reimbursement
1h   33m   52s no reimbursement   
4h   6m   41s no reimbursement
9h   33m   13s no reimbursement
3h   22m   34s no reimbursement
2h   9m   54s no reimbursement

Coupled with the almost 7 BTC that the pool acknowledges it owes him but presumably has not yet made plans to pay him, I can see why this miner left and never returned to eligius.

If you have any disagreement on the math, PLMK where my mistake was.

There's a reason why all the top hashers have been with eligius less than 1 week:
After someone screws you out of BTC, would you keep mining with them?
Hopefully he won't do it to the new users, but you've all been warned. . .