A final Joomla! 1.6 version (1.6.5) has been released, fixing an issue encountered in the "Extension Manager Update", mechanism which will provide a seamless upgrade to the upcoming 1.7.
Along with this release, we've updated RSFirewall! with Joomla! 1.6.5 hash files.
If you're running RSFirewall! on your Joomla! 1.6 installation, we recommend updating both Joomla! and RSFirewall! to the latest revisions and perform a new "System Check".
How to update to RSFirewall! revision 28?