So I've got a weird problem happening. The last two days WP 3.1 is changing old post dates or timestamps to the current day. For example, I imported in a bunch of old posts from last september. A month has gone by with no issues. Then the other day I updated to 3.1 and now it is randomly changing those timestamps to today. I go back and look at the revision history and I can see the date changes from Sept, to Feb 1st (when I imported them), and today. All revisions done by myself even though I did not change the latter of the three.
Kinda weird. Not sure if anyone has seen a similar issue yet. For the last month I haven't seen anything like this, but the last two days after upgrading to WP 3.1 it has been happening each morning.