Bugs fixed:
Important Change: Security Fix: Additional corrections were made for the symlink-related privilege problem originally addressed in MySQL 5.1.24. The original fix did not correctly handle the data directory path name if it contained symlinked directories in its path, and the check was made only at table-creation time, not at table-opening time later. (Bug#32167, CVE-2008-2079)
See also Bug#39277.
Security Fix: MySQL clients linked against OpenSSL can be tricked not to check server certificates. (Bug#47320, CVE-2009-4028)