I am running the latest iCam source on a Windows 7 machine. I have a USB webcam hooked up and also a D-Link IP camera running over wifi. On my iPhone (running iOS 5.1), I receive alerts when motion is detected according to the parameters I have set, however, if my phone is connected to a wifi network (doesn't matter which one - at my office, hotel, someone else's house - wherever), I get the "Source Connection Error" when I try to open the app. As soon as I turn off the wifi radio on my phone, I can see all my cameras with no problem whatsoever.
I'll also add that I have the iCam source running on an XP machine at my mother-in-law's house so that my wife and I can keep an eye on things when she comes to visit us, and I have the same issue - if my iPhone is connected to a wifi network, I can't see anything. Turn off the wifi radio on my phone, and everything works fine.
Does anybody else have this problem?