POW doesn't work right now because there was no PODC block yesterday and consequently all CPIDs are "invalid". This is a problem that has been discussed before, but I don't think there was a solution implemented.
In a couple of hours (after block 49405) everything should be fine.

P.S.: Don't ask me how the network pays right now and who is credited the blocks, but the pools definitely aren't. Perhaps someone with more understanding of the technicalities can answer that question.^^