Hello Vaadin Team,
I have tried to explore the http://demo.vaadin.com/book-examples-vaadin7/book page for getting tips and examples
It seems to be that some topics are not published or with error.
For example http://demo.vaadin.com/book-examples-vaadin7/book/#layout.window.mainwindowsize for the topoic Window contains the message “invalid context”
Other topics producing server error messages or similar (see attached file)
Regards alex
