If you create a new project, and change the name under Project Settings to something that has a colon (meaning this symbol, : ) you get this error:
<img src="http://i.imgur.com/54hhb.png" border="0" />
If you rename the project name and save it again (don't even need to "Save As," just "Save") it goes through just fine. :)
Just a heads up. :)