In addition to the default site, my EE installation has had two other MSM sites for quite some time now that continue to work just fine. Today I went to create a third, without importing or duplicating any data or preferences. I added my directory, copied in index.php and admin.php, edited them as directed, set up a template group with a test template, and tried to preview my site to confirm everything is working. Well instead of my test template, I see the front page of the default website. In fact, any time I put in a valid url for my new site, the default website’s homepage comes up. Yet the other two MSM sites continue to work just fine.
I know I’m not giving you guys much to work with, but can you think of any mis-configuration that might cause this behavior? The fact that a valid URL gives me the homepage while typos give me errors makes me think it’s a configuration issue, but I’ve been trying to figure it out all afternoon and just can’t come up with anything. Any suggestions appreciated.