Joomla! has released version 1.5.17 to fix the issues we mentioned earlier that were plaguing version 1.5.16:
This is a priority release to correct two issues in version 1.5.16. Although there are no security issues fixed in this release, we consider it a security release because a security-related bug has been fixed and because many sites may be upgraded directly from 1.5.15 to 1.5.17.
Visit their site to snag the download if you haven’t already.