Invalid debug settings when trying to deploy a SharePoint workflow project.

When trying to deploy a SP Workflow, I got the following error message:

"The debug settings are not valid. Restart the SharePoint Workflow Project Setup Wizard to enter the settings again."

Thanks to this blog entry, I found what was wrong, though not why it was wrong. Somehow, the "local site [that I] want to use for debugging" (found when you right-click on the project and go to SharePoint Debug Settings) was reset to http:///Docs, which was incorrect. Fixing it is obvious, but how do I avoid this problem in the future?

I was using a SP Sequential Workflow project in VS 2008 w/ an InfoPath form, deploying to a MOSS 2007 server.