Changed user handling.
Both of these changes are designed to make fbConnect authentication easier to support.

Added pic and square_pic to user info data.

Initial changes to use new session model (no "adding" of apps).
Still more work to be done version 2.x.

Initial support for AHAH in forms in FBML.  Using FBJS and an abstraction layer similar to that used in the ahah_forms module.

Added a sanity check to session management.  Relevant when a user adds an iframe app, then removes it.

Added a helper function to cache user info in session, avoiding some inefficient queries to facebook servers.

improved fb_get_friends to try to log in as the user who's friends are being enquired about.  This makes it more reliable on non-canvas pages, but still may not function properly (ie if the user has not established an infinite session).

Disabled problematic fb_node_grants function.

Numerous changes to Drupal for Facebook.  Significant updates.  Manual configuration changes required.  http://drupalforfacebook.org/node/1055

Set custom theme earlier in request cycle (hook_init), less chance that theme_init will be called before us.

Improved _fb_handling_form test to work even when form_token not present, as can be the case when user is not logged in.

now handling nested fb_init_path calls, and not logging is as infinite session when user visits canvas page.

Now using php4 client libraries, even if running php5.  This keeps support for php4, while avoiding uncaught exception problems.

Now using fb_infinite to handle infinite sessions keys.  Cron support re-worked to be based on actions.  Actions for performing cron jobs, updating profile fbml, updating fbml references.

Re-arranged a number of things to make it possible to connect to facebook API from non-canvas pages.  Added fb_actions, where actions will live that invoke facebook APIs.

Now using hook_fb to query add-on modules for facebook user id and infinite session key.  This allows us to display information about the facebook user on drupal's user page.  But more importantly lets third-party modules query for any information facebook provides.  And paves the way for interesting actions and cleaner cron implementation.