I've been working on an application that uses UDP, and today I downloaded the PE demo to analyze my packet data. While PE does correctly report the UDP traffic going to/from the app, it also seems to be reporting additional large packets being received (on the order of around 1828 bytes or so, usually) coming from 0.0.0.0:0, which are filled with zero bytes and which aren't detected within my app by Winsock. These packets come exactly at the rate at which I'm doing recvfrom() checks, and they occur even if recvfrom() says that no data is waiting. Socket Spy reports these mystery packets, and says they are filled entirely with zeros. The Statistics window does not detect them, however; the "Total Datagrams Received" counter stays constant unless I start sending/receiving "real" data. The problem occurs no matter what port I use. Any tips would be appreciated.