Apple's second update for Snow Leopard, Mac OS X 10.6.2, was officially released Monday afternoon, fixing a number of issues including a guest account bug that could potentially delete a user's account data.

The guest account bug is triggered by logging in and out of a guest account on a Snow Leopard machine. Upon logging back in to their regular account, users will find that it has been wiped of all data.

When it was first publicized in October, Apple acknowledged the issue and said it was working on a fix.

The operating system upgrade also features native support for the new multi-touch Magic Mouse. Those on previous versions of Mac OS X required the Wireless Mouse Software update 1.0.

The total list of included fixes, according to Apple, in Mac OS X 10.6.2 is:

General operating system fixes provided for:

an issue that caused data to be deleted when using a guest account

an issue that might cause your system to logout unexpectedly

Spotlight search results not showing Exchange contacts

the reliability of menu extras

an issue in Dictionary when using Hebrew as the primary language

shutter-click sound effect when taking a screenshot

an issue with the four-finger swipe gesture

an issue adding images to contacts in Address Book

an issue in Front Row that could cause sluggish or slow frame rates while watching videos

creation of mobile accounts for Active Directory users

reliability and duration of VPN connections

general reliability improvements for iWork, iLife, Aperture, Final Cut Studio, MobileMe, and iDisk

overall improvements to VoiceOver performance

this update addresses video playback and performance issues for iMac (21.5-inch, Late 2009) and iMac (27-inch, Late 2009) computers that may occur in some situations while AirPort is turned on

Fonts fixes provided for:

an issue with font spacing

an issue in which some Fonts are missing

font duplication issues

an issue with some PostScript Type 1 fonts not working properly

Graphics fixes provided for:

an issue when connecting monitors to DVI and Mini DisplayPort adapters

an issue in which the brightness setting may not be remembered on restart

addresses functionality with specific display models

general reliability and performance improvements when using some applications

Mail fixes provided for:

a situation in which Mail's unread count may not update properly as messages are read on another computer

an issue in which deleted RSS feeds may return

an issue in which Mail cannot preview or Quick Look attachments when composing a new message

an issue that can cause Address Book and/or Mail to stop responding when opened

an issue in which email messages received from an Exchange Server are not formatted correctly

an issue in which Mail reports "Account exceeded bandwidth limits" for some Gmail accounts

MobileMe fixes provided for:

performance when accessing files from iDisk via the Finder and syncing iDisk files

an issue in which syncing iDisk files does not proceed beyond "checking items"

reliability and performance when syncing contacts, calendars, and bookmarks with MobileMe (syncing with iTunes and iSync are also improved)

an issue that prevents some users from logging into MobileMe via the MobileMe System Preference pane

Network file systems fixes provided for:

compatibility with third-party AFP servers

file synchronization for portable home directories

Printing and faxing fixes provided for:

automatic printer updates improvements

Print dialog allowing you to enter and send to more than one fax recipient

Safari fixes provided for: