Retrieving multiple emoticon issue

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What steps will reproduce the problem?

1. Add a event handler to handle all emoticon retrieved and save them to file 
by using OpenStrem().
2. Log into A account by using MSNPSharp library and B account by using 
official client.
3. B send "1" emoticon to A, A can retrieve the emoticon successfully.
4. B send "2 or more" "different" emoticons to A, A can just retrieve some of 
them (maybe 1 or 2), and sometimes these are empty (using OpenStream().Length).
5. B send the missing emoticons, which did not trigger the event handler in 
step 4, to A, they are able to trigger the event handler this time, but all of 
them are empty (using OpenStream().Length).

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

All retrieved emoticons should be sent to event handler one by one and I am 
able to read the content from OpenStream().
Just some of them (2 out of 4 in recent test) are sent to handler, and I got 
empty stream when B sent the missing emoticons to A again (as mentioned in step 
5).

What version of the product are you using? (MSNPSharp, OS, Mono etc.)

A: simple program with MSNPSharp 4.5 stable build on Windows
B: official MSN client (14.0) on Windows

P.S. Even I tried the example application, I got the same result as above.

Is your code check out from SVN or download from our download site?

Yes, I am using the most recent version (4.5).

Please provide any additional information below:

Original issue reported on code.google.com by hkmouse...@gmail.com on 20 Nov 2011 at 5:29