song/identify times out

Hi,

since recently , my calls to the identify API have been answered with a timeout.

curl -i  -F "query=@code""http://developer.echonest.com/api/v4/song/identify?api_key=xxx"

HTTP/1.1 500 Internal Server Error
Date: Wed, 04 Dec 2013 09:54:52 GMT

Content-Length: 94
X-Ratelimit-Remaining: 19
Server: TornadoServer/3.1
X-Ratelimit-Limit: 20
Cache-Control: max-age=86400
Access-Control-Allow-Origin: *
X-Ratelimit-Used: 1
Connection: Keep-alive
Keep-Alive: timeout=15, max=100

{"response": {"status": {"version": "4.2", "code": -1, "message": "The operation timed out"}}}

My other calls are working fine.

I may have exceeded the call limit recently. But if that's the case, shouldn't I get a 429 error with a message telling me I've exceeded the call limit ?

Thanks

Tim'