May 16, 2011
Wireshark 1.6.0rc1 (development) has been released. Installers for Windows, Mac OS X 10.5.5 and above (Intel and PPC), and source code is now available.
This is the first release candidate for Wireshark 1.6.0. It has many new features and supports many more protocols.
Official releases are available right now from the download page.