--- zabbix-1.8.15-2/frontends/php/include/classes/class.cchart.php.bk	2012-12-19 11:51:51.923551279 +0900
+++ zabbix-1.8.15-2/frontends/php/include/classes/class.cchart.php	2012-12-19 11:52:59.774521048 +0900
@@ -2089,6 +2089,8 @@ class CChart extends CGraphDraw{
 
 
 // For each metric
+		$cell = ($this->to_time - $this->from_time)/$this->sizeX;
+		$skip_cell = ZBX_GRAPH_MAX_SKIP_CELL * $cell;
 		for($item = 0; $item < $this->num; $item++){
 			$minY = $this->m_minY[$this->items[$item]['axisside']];
 			$maxY = $this->m_maxY[$this->items[$item]['axisside']];
@@ -2131,22 +2133,26 @@ class CChart extends CGraphDraw{
 // For each X
 			$draw = true;
 			$prevDraw = true;
+			$delay = $this->items[$item]['delay'];
+			$skip_delay = ZBX_GRAPH_MAX_SKIP_DELAY * $delay;
 			for($i = 1, $j = 0; $i < $maxX; $i++){  // new point
 				if(($data['count'][$i] == 0) && ($i != ($maxX-1))) continue;
 
 				$diff	= abs($data['clock'][$i] - $data['clock'][$j]);
-				$cell	= ($this->to_time - $this->from_time)/$this->sizeX;
-				$delay	= $this->items[$item]['delay'];
 
-				if($cell > $delay)
-					$draw = (boolean) ($diff < (ZBX_GRAPH_MAX_SKIP_CELL * $cell));
-				else
-					$draw = (boolean) ($diff < (ZBX_GRAPH_MAX_SKIP_DELAY * $delay));
-
-				if(($draw == false) && ($this->items[$item]['calc_type'] == GRAPH_ITEM_AGGREGATED))
-					$draw = $i - $j < 5;
+				if($this->items[$item]['type'] == ITEM_TYPE_TRAPPER)
+				{
+					$draw = true;
+				}
+				else{
+					if($cell > $delay)
+						$draw = (boolean) ($diff < $skip_cell);
+					else
+						$draw = (boolean) ($diff < $skip_delay);
 
-				if($this->items[$item]['type'] == ITEM_TYPE_TRAPPER) $draw = true;
+					if(($draw == false) && ($this->items[$item]['calc_type'] == GRAPH_ITEM_AGGREGATED))
+						$draw = $i - $j < 5;
+				}
 
 				if(!$draw && !$prevDraw){
 					$draw = true;