mysqldump now dumps triggers for each dumped table. This can be suppressed with the --skip-triggers option. (Bug#10431)

Added new ER_STACK_OVERRUN_NEED_MORE error message to indicate that, while the stack is not completly full, more stack space is required. (Bug#11213)

NDB: Improved handling of the configuration variables NoOfPagesToDiskDuringRestartACC, NoOfPagesToDiskAfterRestartACC, NoOfPagesToDiskDuringRestartTUP, and NoOfPagesToDiskAfterRestartTUP should result in noticeably faster startup times for MySQL Cluster. (Bug#12149)

Added support of where clause for queries with FROM DUAL. (Bug#11745)

Multiple SELECT SQL_CACHE queries in a stored procedure causes error and client hang. (Bug#6897)

Added checks to prevent error when allocating memory when there was insufficient memory available. (Bug#7003)

Character data truncated when GBK characters 0xA3A0 and 0xA1 are present. (Bug#11987)

Comparisons like SELECT "A\\" LIKE "A\\"; fail when using SET NAMES utf8;. (Bug#11754)

Corrected inaccurate error message when inserting out of range data under TRADITIONAL SQL mode. (Bug#11546)

When used in a SELECT query against a view, the GROUP_CONCAT() function returned only a single row. (Bug#11412)

Calling the C API function mysql_stmt_fetch() after all rows of a result set were exhausted would return an error instead of MYSQL_NO_DATA. (Bug#11037)

Information about a trigger was not displayed in the output of SELECT ... FROM INFORMATION_SCHEMA.TRIGGERS when the selected database was INFORMATION_SCHEMA, prior to the trigger's first invocation. (Bug#12127)

Issuing successive FLUSH TABLES WITH READ LOCK would cause the mysql client to hang. (Bug#11934)

In stored procedures, a cursor that fetched an empty string into a variable would set the variable to NULL instead. (Bug#8692)

A trigger dependent on a feature of one SQL_MODE setting would cause an error when invoked after the SQL_MODE was changed. (Bug#5891)

A delayed insert that would duplicate an existing record crashed the server instead. (Bug#12226)

ALTER TABLE when SQL_MODE = 'TRADITIONAL' gave rise to an invalid error message. (Bug#11964)

On AMD64, attempting to repair a MyISAM table with a full-text index would crash the server. (Bug#11684)

The MySQL Cluster backup log was invalid where the number of Cluster nodes was not equal to a power of 2. (Bug#11675)

GROUP_CONCAT() sometimes returned a result with a different collation that that of its arguments. (Bug#10201)

The LPAD() and RPAD() functions returned the wrong length to mysql_fetch_fields(). (Bug#11311)

A UNIQUE VARCHAR column would be mis-identified as MUL in table descriptions. (Bug#11227)

Incorrect error message displayed if user attempted to create a table in a non-existing database using CREATE database_name.table_name syntax. (Bug#10407)

InnoDB: Do not flush after each write, not even before setting up the doublewrite buffer. Flushing can be extremely slow on some systems. (Bug#12125)

InnoDB: True VARCHAR: Return NULL columns in the format expected by MySQL. (Bug#12186)