--- /var/www/zabbix/include/classes/class.cchart.php	2012-07-27 09:48:18.800194572 +0000
+++ /var/www/zabbix.dev/include/classes/class.cchart.php	2012-07-27 04:26:07.976081657 +0000
@@ -401,16 +401,44 @@
 						continue;
 					}
 
-					for ($ci = 0; $ci < $this->sizeX; $ci++) {
-						foreach (array('min', 'max', 'avg') as $var_name) {
-							$shift_var_name = 'shift_'.$var_name;
-							$curr_shift = &$curr_data[$shift_var_name];
-							$curr_var = &$curr_data[$var_name];
-							$prev_shift = &$prev_data[$shift_var_name];
-							$prev_var = &$prev_data[$var_name];
-							$curr_shift[$ci] = $prev_var[$ci] + $prev_shift[$ci];
+					$ci = $this->sizeX-1;
+
+					for ($x = $ci; $prev_data[count][$x] == 0 && $x > 0; $x--);
+
+					if ($x != 0 && $x < $ci) {
+
+						$max_delay = ZBX_GRAPH_MAX_SKIP_DELAY * $this->items[$j]['delay'];
+						$diff = abs($prev_data['clock'][$ci] - $prev_data['clock'][$x]);
+
+						if ( $diff < $max_delay ) {
+
+							for (; $prev_data[count][$ci] == 0; $ci--) {
+								foreach (array('min', 'max', 'avg') as $var_name) {
+									$shift_var_name = 'shift_'.$var_name;
+									$curr_data[$shift_var_name][$ci] = $prev_data[$shift_var_name][$ci] + $prev_data[$var_name][$ci];
+								}
+							}
+
 						}
+
 					}
+
+					for (; $ci >= 0; $ci--) {
+
+						if ($prev_data[count][$ci] == 0) {
+							foreach (array('min', 'max', 'avg') as $var_name) {
+								$shift_var_name = 'shift_'.$var_name;
+								$curr_data[$shift_var_name][$ci] = $prev_data[$shift_var_name][$ci];
+							}
+						} else {
+							foreach (array('min', 'max', 'avg') as $var_name) {
+								$shift_var_name = 'shift_'.$var_name;
+								$curr_data[$shift_var_name][$ci] = $prev_data[$shift_var_name][$ci] + $prev_data[$var_name][$ci];
+							}
+						}
+
+					}
+
 					break;
 				}
 			}