I'm just bumping in here because of some hilarity relating to this timetable:
Amtrak is currently showing a new timetable starting November 10...
...and a new new timetable starting November 11. I think this might be a record for the shortest time an official timetable has been valid (the only other candidate being the cluster surrounding 501).
NB, the changes are mostly a few minutes getting pulled out of the schedule south of Albany.