Joomla! 1.0.13 [ Sunglow ] is now available for download which includes the features / improvements noted below.

Several low-risk security fixes
Improved password storage system
Easier control over Register Globals Emulation
An Itemid backwards compatibility setting
Improved administrative session security
Improved HTTP/HTTPS switchover support

For more information and to download the latest version  read the Joomla 1.0.13 article at the offical web site.