Wireshark dropping outgoing packets on Windows 7 x64

[<gdalevich () hotmail com>]

Hello,

I am trying to use Wireshark 1.2.9 (WinPcap 4.1.1) on Windows 7 64-bit and running into a strange problem.  Wireshark 
does not capture most outgoing TCP packets of length > 0.  

That is when you try to receive a large block of data via TCP it works fine.  However, when you try to send a large 
block of data it drops the majority of outgoing TCP packets.

Have you seen anything like this?  Any ideas on what the issue may be and how to solve it?

Thanks.

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