runtimeexception on 'esc'

[makemeunsee]

pressing 'esc' in during the game triggers an exception related to the websockets:

[ERROR] [12/03/2012 16:02:41.827] [promise-akka.actor.default-dispatcher-56] [akka.dispatch.Dispatcher] Getting messages on a supposedly closed socket? frame: EOF
java.lang.RuntimeException: Getting messages on a supposedly closed socket? frame: EOF
at scala.sys.package$.error(package.scala:27)
at play.core.server.netty.WebSocketHandler$$anon$2$$anonfun$frameReceived$1$$anonfun$apply$3$$anonfun$apply$4.apply(WebSocketHandler.scala:42)
at play.core.server.netty.WebSocketHandler$$anon$2$$anonfun$frameReceived$1$$anonfun$apply$3$$anonfun$apply$4.apply(WebSocketHandler.scala:42)
at play.api.libs.iteratee.Done$$anon$20.fold(Iteratee.scala:327)
at play.api.libs.iteratee.Iteratee$$anon$18$$anonfun$fold$1.apply(Iteratee.scala:16)
at play.api.libs.iteratee.Iteratee$$anon$18$$anonfun$fold$1.apply(Iteratee.scala:16)
at play.api.libs.concurrent.AkkaPromise$$anonfun$flatMap$1.apply(Akka.scala:58)
at play.api.libs.concurrent.AkkaPromise$$anonfun$flatMap$1.apply(Akka.scala:57)
at akka.dispatch.Future$$anonfun$onSuccess$1.apply(Future.scala:484)
at akka.dispatch.Future$$anonfun$onSuccess$1.apply(Future.scala:483)
at akka.dispatch.KeptPromise$$anonfun$onComplete$2.apply$mcV$sp(Future.scala:956)
at akka.dispatch.Future$$anon$4$$anonfun$run$1.apply$mcV$sp(Future.scala:386)
at akka.dispatch.Future$$anon$4$$anonfun$run$1.apply(Future.scala:378)
at akka.dispatch.Future$$anon$4$$anonfun$run$1.apply(Future.scala:378)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:57)
at akka.dispatch.Future$$anon$4.run(Future.scala:378)
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:94)
at akka.jsr166y.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1381)
at akka.jsr166y.ForkJoinTask.doExec(ForkJoinTask.java:259)
at akka.jsr166y.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:975)
at akka.jsr166y.ForkJoinPool.runWorker(ForkJoinPool.java:1479)
at akka.jsr166y.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:104)

[makemeunsee]

firefox bug/feature:
https://bugzilla.mozilla.org/show_bug.cgi?id=614304
gotta decide if we write a work around for this or not...
does not happen on chrome.

[makemeunsee]

the exception also occurs when joining the next game, so it's still gotta be investigated.