Drupal is out with its 4.5.2 upgrade. It is a very simple upgrade and I had zero problems. Checking the changelog reveals Drupal is now four years and two days old (based on the 1.0 date of January 15, 2001). Happy birthday Drupal! Those of us using it are looking forward to several more great years.
Later today I will likely write a little more about Ranchero Software's Mars Edit which I've been using the last couple of days. Great software. Drupal users have to tell it to use Movable Type settings to get all the extras to work.
Update Looking at a post on the Drupal site it seems tracker isn't working. The tracker module has two changes of significance. Lines 70 and 73 have added 'AND c.status = 0' to the SQL statement. Removing that statement restores previous tracker behavior. What does it break?