diff --git a/app/controller/task.php b/app/controller/task.php
index e3d8fd9..8569692 100644
--- a/app/controller/task.php
+++ b/app/controller/task.php
@@ -89,9 +89,9 @@ class Task extends AppController {
 	
 	public function mainReaction() {
 		// drop if no checkbox have been checked
-		if (!isset($_POST['chk'])) {
+		if (!$this->fc->chkReqVar('chk')) {
 			// -TODO- show error
-			$this->fc->redirect(APP_WWW_URI.'task/main/','please check at least one task');
+			$this->fc->redirect(APP_WWW_URI.'task/main/','please mark at least one task');
 		}
 		// check action request
 		$action = $this->fc->chkReqVar('report,open,close,valid,archive,unarchive');
diff --git a/app/model/task.php b/app/model/task.php
index 752090e..fde9d01 100644
--- a/app/model/task.php
+++ b/app/model/task.php
@@ -57,7 +57,7 @@ class TaskModel extends Model {
 		}
 		ArrayHelper::arrayTrim($arr);
 		$obj = new TaskModel();
-		$tst = substr($arr[1],0,1);
+		$tst = substr($arr[2],0,1);
 		switch ($tst) {
 		case '*': // multiple
 			if ($arr[1] == '**') {
diff --git a/lib/class/front.php b/lib/class/front.php
index 712c6a5..9fbbd76 100644
--- a/lib/class/front.php
+++ b/lib/class/front.php
@@ -251,7 +251,9 @@ class FrontController extends HelpableSingleton {
 		foreach ($arrReq as $var) {
 			if (count($GLOBALS[$var])) {
 				foreach($GLOBALS[$var] as $key => $val) {
-					$GLOBALS[$var][$key] = stripslashes($val);
+					if (is_string($val)) {
+						$GLOBALS[$var][$key] = stripslashes($val);
+					}
 				}
 			}
 		}