Server timestamp possible fix.

server/ricochet.js

@@ -304,7 +304,7 @@ Ricochet.prototype.msgSolve = function(message) {
     clearTimeout(this.countdownTimer);
 
     this.countdownTimer = setTimeout(this.onCountdownComplete.bind(this), this.countdownDuration * 1000);
-    this.countdownTimestamp = new Date().getTime();
+    this.countdownTimestamp = new Date().now();
 
     this.state = STATE.COUNTDOWN;