Today I encountered a very irritating error while publishing my InfoPath 2007 form to a MOSS 2007 server with InfoPath Form Services installed. InfoPath refused to publish my form with the message: "The following URL is not valid: http://oss1.
Since I am using an official image which was created by Microsoft itself, I assumed there was nothing wrong with installation, but with configuration. After searching for quite some time without results, I started googling and found this article by Firedancer which came up with a solution: stop the System Event Notification Service! I have no idea how they found this solution, but it sure works! Thanks Firedancer!