Now using latest PHP libs from facebook.
Replaced users_isAppAdded with users_isAppUser

Potential security issue here, so enabled only when fb_session_cookieless_iframe variable is set.
Solves a multitude of session state issues, particularly on iframes in safari and ie6 where cookie support is less than acceptable.

Added a block and callback which help keep canvas page session in sync with other requests (iframes, etc).
Added fb_canvas_form_action_via_facebook, to suppress the default form alters.
Fixed indentation.

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

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

Added a helper function using regexps to clean up links in profile fbml.

This is experimental code because it may confuse users and administrators to see facebook names where they would otherwise see drupal username.

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