Avoid duplicating output when verbose option is turned on

Mage/Console.php

@@ -181,6 +181,7 @@ class Console
     {
         self::log(strip_tags($message));
 
+        if (!self::$verboseLogEnabled) {
             self::$screenBuffer .= str_repeat("\t", $tabs)
                 . strip_tags($message)
                 . str_repeat(PHP_EOL, $newLine);
@@ -191,6 +192,7 @@ class Console
 
             echo $output;
         }
+    }
 
     /**
      * Executes a Command on the Shell