title: Microsoft Office preview shows a different document in alfresco share
body: <p>I am sure, a question regarding Microsoft Office preview in share has been asked previously, but I am facing a strange issue. The preview for document A shows up Document B in Alfresco share. Earlier it was showing a previous version, but now it shows a totally different document. When the user downloads it, its the right document. And this happens only with some files, especially files with .xks, .xlsx extension.
  What could be causing this ? 
  Its confusing the users and would really appreciate if someone could give pointer on how the issue can be fixed.</p>
  
  <p>Thanks.</p>