Ok, I've got my project building and running on the 360. A friend of mine wanted to see what I was up to, so I moved the source over to an PC hosted XNA project, and got it running there too.
Before I sent the .EXE to him, I double clicked on it, and I just get a message box that says "Application generated an exception that could not be handled."
This works fine under GSE, but doesn't seem to work when clicking directly through Windows.
What am I missing