As of this morning, there's an actual bit of code in the CVS version of the core of Drupal. 4 lines of code in 4 different files. Woohoo! I have submitted a patch here and there before, but this is the first time a patch of mine is accepted into the core of Drupal.
So what's this patch about you might wonder? In the admin area of drupal - which most of you will never see - you can now see the referrer of a page that caused an error (such as a 'file not found' error). Exciting stuff.