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As it takes time to collect and roll out the data at each end, the Google Directory is always behind the Open Directory. But the last one was more behind than usual. I would guess that it was meant to roll out in late February, but got delayed.
Since there are sites out there still using 4 and 5 year old ODP data, having a delay of an extra fortnight or so for the Google update is no biggie. In fact, when the ODP converted their data over from a myraid of character encodings previously decided on a per-category basis to be completely UTF-8 directory-wide, Google failed to update at all on a regular basis; I think they managed to make a total of only about 3 updates in the whole year.