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Pidgin is a multi-protocol instant messaging client for Linux, BSD, MacOS X, and Windows.

It is compatible with AIM and ICQ (Oscar protocol), MSN Messenger, Yahoo!, IRC, Jabber, Gadu-Gadu, SILC, Novell GroupWise Messenger, Lotus Sametime, and Zephyr networks. Gaim users can log in to multiple accounts on multiple IM networks simultaneously. This means that you can be chatting with friends on AOL Instant Messenger, talking to a friend on Yahoo Messenger, and sitting in an IRC channel all at the same time. Pidgin supports many features of the various networks, such as file transfer, away messages, and typing notification. It also goes beyond that and provides many unique features. A few popular features are Buddy Pounces, which give the ability to notify you, send a message, play a sound, or run a program when a specific buddy goes away, signs online, or returns from idle; and plugins, consisting of text replacement, a buddy ticker, extended message notification, iconify on away, spell checking, tabbed conversations, and more. Pidgin runs on a number of platforms, including Windows, Linux, and Qtopia (Sharp Zaurus and iPaq).

What's New:

* libpurple
o TLS certificates are actually stored to the local cache once again (accepting a name mismatch on a certificate should now be remembered)

* General
o Build-time fixes for Solaris. (Paul Townsend)

* AIM and ICQ
o Messages from some mobile clients are no longer displayed as Chinese characters (broken in 2.6.4)

* MSN
o Fix an issue allowing a remote user to download arbitrary files from a libpurple client. (CVE-2010-0013)

* XMPP
o Do not crash when attempting to register for a new account on Windows.
o Fix file transfer with clients that do not support Entity Capabilities (e.g. Spark)