og_mail and og views fixes.
Sorry, the best you can do to know what changed is to browse the message for each commit from June 4, 2007 to Sep 21 2007.
major group create/edit fix - http://drupal.org/node/147919
minor instal profile fix - http://drupal.org/node/111345
minor install profile fix
quite a few bug fixes. see changelog - http://cvs.drupal.org/viewcvs/drupal/contributions/modules/og/og.module?...
please read the cvs commit logs for an idea of recent changes - http://cvs.drupal.org/viewcvs/drupal/contributions/modules/og/og.module
fix for inital enabled/disabled state of Public checkbox.
fixed subscribers block
See the changes between jan 15, 2007 and march 2, 2007 at http://cvs.drupal.org/viewcvs/drupal/contributions/modules/og/og.module
For now, this is the only release for 5.0.
The HEAD release is compatible with Drupal6
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