Apple has just released OS X Mountain Lion 10.8.5 via Software Update



From TUAW:

This update:


Fixes an issue that may prevent Mail from displaying messages.
Improves AFP file transfer performance over 802.11ac Wi-Fi.
Resolves an issue that may prevent a screen saver from starting automatically.
Improves Xsan reliability.
Improves reliability when transferring large files over Ethernet.
Improves performance when authenticating to an Open Directory server.
Addresses an issue that prevented a smart card from unlocking preference panes in System Preferences.
Contains the improvements included in MacBook Air (Mid 2013) Software Update 1.0.

  Apple releases OS X Mountain Lion 10.8.5