The --no-daemon has been renamed to The --daemon. By default, MySQL Proxy now starts in foreground mode. Use the --daemon option to override this and start in daemon mode.

A memory leak occurred in MySQL Proxy if clients older than MySQL 4.1 connected to it. (Bug#50993)

A segmentation fault occurred in MySQL Proxy if clients older than MySQL 4.1 connected to it. (Bug#48641)

MySQL Proxy would load a configuration file with unsafe permissions, which could permit password information to be exposed through the file. MySQL Proxy now refuses to load a configuration file with unsafe permissions. (Bug#47589)

Several supplied scripts were updated to account for flag and structure changes:

(Bug#47349, Bug#45408, Bug#47345, Bug#43424, Bug#42841, Bug#46141)

The line numbers provided in stack traces were off by one. (Bug#47348)

MySQL Proxy accepted more than one address in the value of the --proxy-backend-addresses option. You should specify one --proxy-backend-addresses option for each backend address. (Bug#47273)

MySQL Proxy returned the wrong version string internally from the proxy.PROXY_VERSION constant. (Bug#45996)

MySQL Proxy could stop accepting network packets if it received a large number of packets. The listen queue has been extended to permit a larger backlog. (Bug#45878, Bug#43278)

Due to a memory leak, memory usage for each new connection to the proxy increased, leading to very high consumption. (Bug#45272)

MySQL Proxy failed to work with certain versions of MySQL, including MySQL 5.1.15, where a change in the MySQL protocol existed. Now Proxy denies COM_CHANGE_USER commands when it is connected to MySQL 5.1.14 to 5.1.17 servers by sending back an error: COM_CHANGE_USER is broken on 5.1.14-.17, please upgrade the MySQL Server. (Bug#45167)

See also Bug#25371.

Logging to syslog with the --log-use-syslog option did not work. (Bug#36431)

MySQL Proxy could incorrectly insert NULL values into the returned result set, even though non-NULL values were returned in the original query. (Bug#35729)

MySQL Proxy raised an error when processing query packets larger than 16MB. (Bug#35202)