I have a report that recent changes in Seattle's Class B are not
reflected in published airspace data (including justsoar.com).

The only evidence I can find of a recent change is in the Federal
Register which mentions an effective date of Dec 15th:

http://www.federalregister.gov/artic...ace-seattle-wa

Does anyone know more about this? Is the Federal Register ahead of the
FAA's charting office?

ted/2NO