I've had wordpress running on my primary domain for quite some time now. It's been running on http://www.mydomain.com on IIS 7.
I've recently setup a subdomain running within another site on the same IIS 7 server with a unique MySQL database (each blog is independent of the other as far as WordPress files and MySQL database.
The problem I've run into is that whenever I visit http://www.mydomain.com it loads subdomain.mydomain.com. Additionally when I visit subdomain.mydomain.com it loads (as it should).
Any ideas on why the subdomain blog has suddenly taken over?