MBR Streaming - 2 questions...

I am trying to build a live MBR player and i have 2 problems
1. My first problem is that sometimes i get this error:
ArgumentError: Error #1063: Argument count mismatch on org.osmf.net::NetStreamSwitchManager/onPlayStatus(). Expected 1, got 3.
    at Function/http://adobe.com/AS3/2006/builtin::apply()
    at org.osmf.net::NetClient/invokeHandlers()[/Users/me/Work/OSMF/fc1-stable/framework/OSMF/or g/osmf/net/NetClient.as:244]
    at <anonymous>()[/Users/me/Work/OSMF/fc1-stable/framework/OSMF/org/osmf/net/NetClient.as:193 ]
It has to do with the fact that onPlayStatus gets from server 3 arguments instead of 1. The arguments are: onPlayStatus(0,,[object Object]) and i only need the 3rd wich is my info object. I can do a hack but i wonder if is not a bug in the framework. And i wonder what first 2 arguments means....
PS.: The server is wowza and the Adobe Flash Media Live Encoder sees it as "Primary - Connected to FMS/3,5,2,654"
2. The second problem has to do with the fact that i need to know when the stream start (so i can change my view accordingly) by listenting to an event dispatched by MediaPlayer. Does MediaPlayer dispatch an event like NetStream.Play.PublishNotify or NetStream.Play.Start ?
Thanks!

1. I've never seen an onPlayStatus call that has more than one argument.  Is this a common case?  Something Wowza-specific?  A bug in the server script?  There's no workaround at the framework level (short of changing the signature of NetStreamSwitchManager.onPlayStatus).  If you think this is a common case with Wowza, can you file a bug here? https://bugs.adobe.com/jira/browse/FM
2. MediaPlayer dispatches events for playStateChange and mediaPlayerStateChange.  You could listen for the former to determine when it enters the playing state, or the latter to follow the general state transitions (which typically go uninitialized, loading, ready, buffering, playing).

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