Index: bp-core/bp-core-templatetags.php
===================================================================
--- bp-core/bp-core-templatetags.php	(revision 2738)
+++ bp-core/bp-core-templatetags.php	(working copy)
@@ -1590,6 +1590,15 @@
 	return false;
 }
 
+function bp_is_group_activity() {
+	global $bp;
+
+	if ( BP_GROUPS_SLUG == $bp->current_component && $bp->is_single_item && 'activity' == $bp->current_action )
+		return true;
+
+	return false;
+}
+
 function bp_is_group_forum_topic() {
 	global $bp;
 
Index: bp-themes/bp-default/groups/single/home.php
===================================================================
--- bp-themes/bp-default/groups/single/home.php	(revision 2738)
+++ bp-themes/bp-default/groups/single/home.php	(working copy)
@@ -23,24 +23,41 @@
 			<div id="item-body">
 				<?php do_action( 'bp_before_group_body' ) ?>
 
-				<?php if ( bp_is_group_admin_page() && bp_group_is_visible() ) : ?>
-					<?php locate_template( array( 'groups/single/admin.php' ), true ) ?>
+				<?php if ( bp_group_is_visible() ) : ?>
 
-				<?php elseif ( bp_is_group_members() && bp_group_is_visible() ) : ?>
-					<?php locate_template( array( 'groups/single/members.php' ), true ) ?>
+					<?php if ( bp_is_group_admin_page() ) : ?>
+						<?php locate_template( array( 'groups/single/admin.php' ), true ) ?>
 
-				<?php elseif ( bp_is_group_invites() && bp_group_is_visible() ) : ?>
-					<?php locate_template( array( 'groups/single/send-invites.php' ), true ) ?>
+					<?php elseif ( bp_is_group_home() ) : ?>
 
-				<?php elseif ( bp_is_group_forum() && bp_group_is_visible() ) : ?>
-					<?php locate_template( array( 'groups/single/forum.php' ), true ) ?>
+						<?php if ( function_exists( 'bp_activity_install' ) ) : ?>
+							<?php locate_template( array( 'groups/single/activity.php' ), true ) ?>
 
+						<?php elseif ( function_exists( 'bp_forums_setup' ) ) : ?>
+							<?php locate_template( array( 'groups/single/forum.php' ), true ) ?>
+
+						<?php else : ?>
+							<?php locate_template( array( 'groups/single/members.php' ), true ) ?>
+
+						<?php endif; ?>
+
+					<?php elseif ( function_exists( 'bp_forums_setup' ) && bp_is_group_forum() ) : ?>
+						<?php locate_template( array( 'groups/single/forum.php' ), true ) ?>
+
+					<?php elseif ( function_exists( 'bp_activity_install' ) && bp_is_group_activity() ) : ?>
+						<?php locate_template( array( 'groups/single/forum.php' ), true ) ?>
+
+					<?php elseif ( bp_is_group_members() ) : ?>
+						<?php locate_template( array( 'groups/single/members.php' ), true ) ?>
+
+					<?php elseif ( bp_is_group_invites() ) : ?>
+						<?php locate_template( array( 'groups/single/send-invites.php' ), true ) ?>
+
+					<?php endif; ?>
+
 				<?php elseif ( bp_is_group_membership_request() ) : ?>
 					<?php locate_template( array( 'groups/single/request-membership.php' ), true ) ?>
 
-				<?php elseif ( bp_group_is_visible() ) : ?>
-					<?php locate_template( array( 'groups/single/activity.php' ), true ) ?>
-
 				<?php else : ?>
 					<?php /* The group is not visible, show the status message */ ?>