Empty mask filtering on meta.syncable can create an issue with sync downloads.

Author: cdujeu

core/src/plugins/meta.syncable/class.ChangesTracker.php

@@ -195,6 +195,9 @@ public function switchActions($actionName, $httpVars, $fileVars)
         $masks = array();
         $currentRepo = $this->accessDriver->repository;
         AJXP_Controller::applyHook("role.masks", array($currentRepo->getId(), &$masks, AJXP_Permission::READ));
+        if(count($masks) == 1 && $masks[0] == "/"){
+            $masks = array();
+        }
         $recycle = $currentRepo->getOption("RECYCLE_BIN");
         $recycle = (!empty($recycle)?$recycle:false);