Foswiki 1.0.6 was released 21 Jun 2009. This version introduces a major enhancement in security against Cross-Site Request Forgery.
Further more a central translation framework got introduced which ease the translation process and enables all users to contribute to translations.
The numbers of bugs fixed since the initial Foswiki release exceeds 160. And you will find even more bugs being fixed if you upgrade from TWiki to Foswiki.