Being a loyal fan of Google Chrome from the very beginning, it was all the more unpleasant when it recently decided to disable Silverlight (and some other plugins, like Unity) by default. What it means for our players is one extra step, detailed here: http://atwar-game.com/home/faq.php?faq_id=46.
Annoying as it may be, things will get even worse in September, when Chrome will stop supporting these plugins altogether. Silverlight has been dying a slow death for a while now, and this would be the final nail in its coffin. What it means for us is that we need to roll out the new HTML5 version of the game before that, preferably already bug-free. We're now working extra hard to finish the alpha, to be released some time in June (hopefully). We're fully determined not to go down together with Silverlight and emerge from this debacle stronger than ever!