Some people have reported Joomla! 1.0.x security issues and whilst the Joomla! core dev team have been busy working on Joomla! 1.5 they've not been slack in getting a fix for old 1.0.x users.
As such today sees the release of Joomla! 1.0.14 RC1, so if any users could install and test for issues we could soon see a 1.0.14 stable and even a 1.0.15 :)