Fixes issue #496

framework/yii/logging/Target.php

@@ -204,14 +204,12 @@ abstract class Target extends Component
 			if ($matched) {
 				foreach ($this->except as $category) {
 					$prefix = rtrim($category, '*');
-					foreach ($messages as $i => $message) {
 					if (strpos($message[2], $prefix) === 0 && ($message[2] === $category || $prefix !== $category)) {
 						$matched = false;
 						break;
 					}
 				}
 			}
-			}
 
 			if (!$matched) {
 				unset($messages[$i]);