We recently upgraded to Confluence 5.1.5. Prior to upgrade we built a very rich set of pages using Wiki Markup extensively to create content with tabs and imported Excel files. Following the upgrade all our pages content is completely messed up - decks and cards order is completely different. We are using IE 8. Editor is now very hard to use, its behavior is unpredictable. Edit buttons, such as preview, save, attachments are more often hidden then not - you have to play with the page zoom to see them. Stangely I am not seeing complaints or suggestions on internet. Did we get upgraded too early and nobody started seeing these issues yet? Did we get ugraded incorrectly and so nobody else has the same issues? I am not seeing any useful information anywhere and would appreciate some advice.