title: Vaadin slow in Internet Explorer
body: <p>We have a huge application in Vaadin 6.8.15. It runs fast in chrome, firefox and Safari.
  But in ie it is getting slower and slower with every click. We have views with tabs which
  have up to ten tabbars and up to 50 controls. Also the memory of ie is growing and growing and never freed.</p>
  
  <p>Any ideas ?</p>
  
  <p>Thank you.</p>