Index: branches/RC/core/units/general/helpers/permissions_helper.php
===================================================================
diff -u -N -r10031 -r11245
--- branches/RC/core/units/general/helpers/permissions_helper.php	(.../permissions_helper.php)	(revision 10031)
+++ branches/RC/core/units/general/helpers/permissions_helper.php	(.../permissions_helper.php)	(revision 11245)
@@ -190,8 +190,17 @@
 			}
 
 			// specific permission check for pending & owner permissions: begin
-			$new_item = $this->Application->IsAdmin() && $event_handler->isNewItemCreate($event) ? true : false;
-			$check_status = $this->checkCombinedPermissions($event, $owner_id, $category_id, $new_item);
+			$uploader_events = Array ('OnUploadFile', 'OnDeleteFile', 'OnViewFile');
+			if (in_array($event->Name, $uploader_events)) {
+				// don't recall target object during uploader-related, because OnItemLoad will use incorrect
+				// $user_id in Firefox (during Flash problems session will be used from Internet Exploere)
+				$new_item = false;
+			}
+			else {
+				$new_item = $this->Application->IsAdmin() && $event_handler->isNewItemCreate($event) ? true : false;
+				$check_status = $this->checkCombinedPermissions($event, $owner_id, $category_id, $new_item);
+			}
+
 			if (isset($check_status)) {
 				return $check_status;
 			}