Upgrade to Joomla! 1.0.4
1.0.4 is available as a Full Package, which contains all Joomla! files and a Patch Package which contains only the files that have been changed by the Security work conducted.
1.0.4 Version Information
Thanks to Alan Urquhart, the creator of the Joomla! logo, a Brand Guide is now available.
There are also a variety of logos that you can use, available in multiple graphic formats for you to downlad. More will be added to over time.
The Brand Guide contains a number of important design points and it is important that you review this guide before creating any graphics of your own that incorporate the Joomla! logo.