Yeah, I'd like to chime in here and say that I have more than half a bitcoin missing. I was last paid out on 02/09/2013 (six days ago) at 3:28 PM, or 9/2/13 03:28pm, as MtRed reports it. That was all of the BTC then confirmed. Since then, I have earned the following rewards:

0.0016706   0.00000839   215   97 req.
0.04080413   0.00020505   5349   95 req.
0.02030988   0.00010206   2627   41 req.
0.03147345   0.00015816   4040   Credited
0.02641037   0.00013272   3455   Yes
0.02196829   0.00011039   2863   Yes
0.00768603   0.00003862   1010   Yes
0.03758359   0.00018886   4783   Yes
0.00142602   0.00000717   185   Yes
0.01529278   0.00007685   1981   Yes
0.05134512   0.00025802   6649   Yes
0.00211016   0.0000106   272   Yes
0.04543045   0.00022829   5859   Yes
0.04251902   0.00021366   5562   Yes
0.06530097   0.00032815   8455   Yes
0.01162271   0.00005841   1492   Yes
0.06884674   0.00034596   8798   Yes
0.00047407   0.00000238   62   Yes
0.01397114   0.00007021   1828   Yes
0.00564581   0.00002837   725   Credited
0.0260326   0.00013082   3317   Yes
0.01126521   0.00005661   1451   Yes
0.01583164   0.00007956   2081   Yes
0.01332629   0.00006697   1714   Yes
0.00656988   0.00003301   854   Yes
0.00339039   0.00001704   443   Yes
0.00292814   0.00001471   381   Yes
0.00525306   0.0000264   691   Yes
0.04953845   0.00024894   6434   Yes
0.03161837   0.00015889   4080   Yes

The sum of these payouts rewards is 0.67764536. Subtract from that my current confirmed and unconfirmed balances, and it comes out to 0.58338730 BTC missing.