Index: bp-blogs.php
===================================================================
--- bp-blogs.php	(revision 1207)
+++ bp-blogs.php	(working copy)
@@ -743,7 +743,7 @@
 
 	if ( !$meta_key ) {
 		$wpdb->query( $wpdb->prepare( "DELETE FROM {$bp->blogs->table_name_blogmeta} WHERE blog_id = %d", $blog_id ) );		
-	} else if ( !$meta_value ) {
+	} else if ( $meta_value ) {
 		$wpdb->query( $wpdb->prepare( "DELETE FROM {$bp->blogs->table_name_blogmeta} WHERE blog_id = %d AND meta_key = %s AND meta_value = %s", $blog_id, $meta_key, $meta_value ) );
 	} else {
 		$wpdb->query( $wpdb->prepare( "DELETE FROM {$bp->blogs->table_name_blogmeta} WHERE blog_id = %d AND meta_key = %s", $blog_id, $meta_key ) );
Index: bp-groups.php
===================================================================
--- bp-groups.php	(revision 1207)
+++ bp-groups.php	(working copy)
@@ -2162,7 +2162,7 @@
 
 	if ( !$meta_key ) {
 		$wpdb->query( $wpdb->prepare( "DELETE FROM " . $bp->groups->table_name_groupmeta . " WHERE group_id = %d", $group_id ) );		
-	} else if ( !$meta_value ) {
+	} else if ( $meta_value ) {
 		$wpdb->query( $wpdb->prepare( "DELETE FROM " . $bp->groups->table_name_groupmeta . " WHERE group_id = %d AND meta_key = %s AND meta_value = %s", $group_id, $meta_key, $meta_value ) );
 	} else {
 		$wpdb->query( $wpdb->prepare( "DELETE FROM " . $bp->groups->table_name_groupmeta . " WHERE group_id = %d AND meta_key = %s", $group_id, $meta_key ) );