not force a new tree to be created.

parent elements in the tree.

class from being added to the class attribute

warning.

added a separate static cache for nested and flat arrays in the og_subgroups_get_group_children() function

fix bug in views Group ID argument that would improperly return group post data that has null or 0 for a group_id values

Added ability to optionally load the hierarchy block via AJAX. Included access check for 'access content' permission before showing group tree.