is http:request's {self,once} option broken?

[Adam Kocoloski]

Hi, I'd really like to use this option, but as far as I can tell it  
does not work in R13B.  I'd be very happy if someone could demonstrate  
that the HTTP client actually does wait for a call to stream_next  
before sending subsequent chunks when this option is specified.  When  
I try I get all the chunks in my mailbox automatically.  Best,

Adam