title: QT Creator - plugins error messages
body: <p>I have installed QT Creator 2.8.1. When it starts pop-up window shows : 
  QT Plugins loader messages : The following plugins have errors and cannot be loaded
  *<em>List of plugins *</em>
  All of them have the same structure of message. For example : 
   Cannot load plugin because dependency failed to load: CppTools(2.8.1)</p>
  
  <p>Does anyone have idea how to resolve this?</p>
  
  <p>Thanks...</p>