XREP messages delivered late

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What steps will reproduce the problem?
1. Create a simple server (XREP socket)
2. Connect the flash socket to the server
3. The server sleeps 10 seconds and sends message++ each time

What is the expected output? What do you see instead?

I expect to see each message delivered in timely fashion but it seems that 
message 1 gets delivered when message 2 is sent, message 3 when 2 is sent etc. 
When I connect 'normal' client it receives messages as they are sent.

What version of the product are you using? On what operating system?

The precompiled version linked from zeromq site.

Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 1 Sep 2011 at 10:15