diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index d88dea416..0925e1fd7 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -1363,15 +1363,15 @@ class Level implements ChunkManager, Metadatable{
 	}
 
 	/**
-	 * Returns the Tile in a position, or false if not found
+	 * Returns the Tile in a position, or null if not found
 	 *
 	 * @param Vector3 $pos
 	 *
-	 * @return bool|Tile
+	 * @return Tile
 	 */
 	public function getTile(Vector3 $pos){
 		if($pos instanceof Position and $pos->getLevel() !== $this){
-			return false;
+			return null;
 		}
 		$tiles = $this->getChunkTiles($pos->x >> 4, $pos->z >> 4);
 		if(count($tiles) > 0){
@@ -1382,7 +1382,7 @@ class Level implements ChunkManager, Metadatable{
 			}
 		}
 
-		return false;
+		return null;
 	}
 
 	/**
diff --git a/src/pocketmine/tile/Sign.php b/src/pocketmine/tile/Sign.php
index ce020f900..fae67c191 100644
--- a/src/pocketmine/tile/Sign.php
+++ b/src/pocketmine/tile/Sign.php
@@ -46,6 +46,11 @@ class Sign extends Spawnable{
 		parent::__construct($chunk, $nbt);
 	}
 
+	public function saveNBT(){
+		parent::saveNBT();
+		unset($this->namedtag->Creator);
+	}
+
 	public function setText($line1 = "", $line2 = "", $line3 = "", $line4 = ""){
 		$this->namedtag->Text1 = new String("Text1", $line1);
 		$this->namedtag->Text2 = new String("Text2", $line2);