has to do with the new flash updates, as troops being put in attacks with out your knowledge 

.. don't attck in full screen mode nor do prizes 

This may be another Flash issue but when a new Tournament comes out and you go to the Events tab to start it, sometimes if the description about the tourney (on the page before rewards page comes up) is too long you can not get to the Continue button.  I've had to exit full screen and sometimes zoom to 60% to be able to click the button.