You might have already noticed, but I'll re-iterate nevertheless: the Drupal project has released Drupal 4.6.4 and 4.5.6 which fix three security vulnerabilities. Everyone running a Drupal site is advised to upgrade, as always.
Multiple people were mighty busy yesterday preparing, finalizing and testing the patches and advisories. I was one of them, although I was more like lurking around trying to look busy ;-) Anyways, I have sent the respective advisories (DRUPAL-SA-2005-007, DRUPAL-SA-2005-008, DRUPAL-SA-2005-009) to the "usual suspects" today: Bugtraq, Full Disclosure, and the php-sec mailing list. The advisories have already been picked up by Secunia and a bunch of other security sites...
Btw: I finally received news that my domain was transferred to my new web hoster today, which led to a short downtime. Everything should be fine now. If you notice any problems, please drop me a note.