I've also noticed in the last month or so another quirk with the notes. I've noticed that if I choose a time frame from the drop down menu, it doesn't quite fit for what I've chosen. I'll take command for an example.

If I choose "Posted in the last 1 day" from the drop down menu, I actually get notes posted from around Dec. 15, 2009 or so.

If I choose 3 days, I get Dec. 13th or so.

1 week= Dec. 9

2 weeks= Dec. 2

So on and forth...

It appears like it takes the original 1 week buffer into account when choosing an option. I'm only an hour off the server time zone, I think, so that couldn't have anything to do with it, correct?