No problem here with this one. Maybe your miner(s) went for a rest a short time before the end of this block, in that case Slush's 'anti hopping' mechanism reduces your reward... It can also work in your favor if you join a block some time before it finishes, and you get 'the full reward' despite not spending the full duration there...
I had
20910 2013-11-22 01:58:43 11:11:58 2147483647 198336 0.00155814
You should have received something like 0.000103 if you were mining 'constantly' through this block.
Cheers
Hm. There was a storm going on not too long ago, so there could have been a power surge or something that messed with my miners. Just unlucky, I suppose.