Comment 1 for bug 139686

Upstream changelog:

Version 2.2.0 (09/13/2007):
 http://developer.pidgin.im/query?status=closed&milestone=2.2.0

 Libpurple:
 * New protocol plugin: MySpaceIM (Jeff Connelly, Google Summer of
   Code)
 * XMPP enhancements. See
    http://www.adiumx.com/blog/2007/07/soc-xmpp-update.php (Andreas
   Monitzer, Google Summer of Code for Adium)
 * Certificate management. Libpurple will validate certificates on
   SSL-encrypted protocols (William Ehlhardt, Google Summer of Code)
 * Some adjustments were made to fix sending messages when using
   the MSN HTTP method. (Laszlo Pandy)
 * Yahoo! Chat is fixed.
 * Some AIM file transfer issues between Pidgin and other clients
   have been fixed. (Kyryll A Mirnenko)
 * Properly restore idle status and time for AIM and ICQ accounts
   when they reconnect after being disconnected.

 Pidgin:
 * Insert Horizontal Rules and Strikethrough text from toolbar.
 * Option to show protocol icons in the buddy list, from the
   Buddies > Show menu. (Justin Heiner)
 * Ability to build with native, non-X11 GTK+ on OSX. (Anders
   Hasselqvist)
 * Remember the 'Enable Sounds' setting for a conversation.
 * Right-clicking the empty space in the formatting toolbar
   allows you to toggle back to the old "ungrouped" version.
 * Protocols supporting account registration via Pidgin now show
   a descriptive checkbox instead of a vague "Register" button.
 * Fixed a bug where a tab would be shown on single conversations
   when tabs were disabled.

 Finch:
 * Per-conversation mute and logging options (accessible from the menu).