The release below is from prior to Guacamole's acceptance into the Apache Incubator. It is not an Apache Software Foundation release, and is licensed under the MIT license. The latest release of Apache Guacamole is 1.5.5.
The 0.8.4 release is a minor bugfix release, updating the 0.8.x series. It maintains compatibility with 0.8.3, and addresses outstanding issues with the MySQL authentication and the terminal emulation used by Guacamole’s SSH support.
The MySQL auth would occasionally report connections as in-use when they were actually free. This is now fixed. An issue which caused logins to initially fail when the MySQL connection had not recently been used is fixed as well.
SSH suffered from an issue where the cursor, and possibly text on the screen, would disappear when the browser window was resized. This is now fixed.