Mozilla has released the next updates for Mozilla Thunderbird with versions 17.0.6 and 17.0.6esr (Thunderbird for Organizations) on May 14th, 2013. Fixes in this version include:

• Various security fixes
• Thunderbird now supports the Twitter API version 1.1 ahead of Twitter closing the 1.0 version (Bug 857049)

Depending on the operating system and update settings (Tools > Options… > Advanced > Update Tab), users will be prompted to update within in the next 48-hours. Windows users can also go to Help > About Thunderbird and click the Check for Updates button. Users can choose to manually download and install Thunderbird via getthunderbird.com. The next scheduled release will be Thunderbird 17.0.7 and 17.0.7esr on June 25th, 2013.