MySQL Installer Guide
32-bit binaries of MySQL products were installed on 64-bit systems by default. The installer now defaults to the operating system's build architecture. (Bug #20444148)
The MySQL Installer manifest was missing 64-bit builds of the MySQL Utilities. Therefore, they were neither recognized nor installed. (Bug #19724973, Bug #74190)
It was not possible to simultaneously install Connector/Python 2.0.1 for multiple Python versions, such as Python 2.7, Python 3.3, and Python 3.4. (Bug #19620660)
MySQL Connector/ODBC was missing from the manifest, and this caused the installation to fail when using the web variant of MySQL Installer. A workaround was to manually download and install this connector. (Bug #18551314, Bug #72298)