"Tiki named to the Seventh Annual EContent 100 for 2007. The annual list contains the companies and projects 'that matter most in the digital content industry.'"
For some days we have been working on fixing security flaws reported by third party analysts. As always in such case, release is quickly prepared and holes filled.
As this upgrade fixes various security holes, you are strongly advised to upgrade any 1.9.x tiki (or earlier) that you have at hand, and call your friends to spread the word.
1.9.9 also introduces a new feature to alert admin of available new releases upstream.