I have figured out what was generating the error messages when I load my solutions that contain Web Application Projects. I had done a manual conversion for reasons that I will explain in a separate post. In addition to the directions in Scott Guthrie's post, (since our projects are all in scc) I needed to convert the SCC configuration for the projects to conform to a "Local" (as opposed to "Web") project.
Well, I either made mistakes when changing the configuration, or VS 2005 re-wrote the configuration when I loaded the project, because the scc entries were definitely messed up. It had the web application projects one directory deeper in the tree than they actually are. Once I corrected the entries, the projects loaded fine, without error.
As an aside, why in the world is the solution file not xml?
Best regards,
Metro.