Out of sync error when 2 tabs opened


I’ve a vaadin application.
I open 2 tabs on 2 different pages.
On the first tab, in the address bar, i enter “www.google.com” in place to the address of my app.
When google is loaded, i click on the back button on firefox. I go back to my app.
On the second tab, i click a link.

The popup “Out of sync error” appears. I must click it or press F5 to reload my page and re-click the link.

Exception in my log :
14 janv. 2013 13:39:06 com.vaadin.terminal.gwt.server.AbstractCommunicationManager handleVariableBurst
ATTENTION: Warning: Ignoring variable change for non-existent component, VAR_PID=PID9098

Can you help me ? Any idea for my problem ?

Thanks for advance,



Multiple tabs support is something that is not provided out of the box in Vaadin6. In order to add it to your project you can follow the instructions of
wiki-tutorial. An alternate way of doing it is described in
blog post (more reliable though ‘hackier’). The best solution, however, would be to use Vaadin7, which provides this functionality by default.