Firefox has the ability to turn off this warning on a site by site basis.
Internet Explorer lets you turn warnings on or off (Tools --> Internet Options --> Advanced -->Security -- uncheck "warn about certificate address mismatch") for all sites. This is of course dangerous if you use IE for anything other than
testing your own apps. I don't know of a way to do this on a site-by-site basis for IE. Of course turning this off for your browser won't fix it for other visitors to your web site.
EDIT: I only have IE9. IE7 should allow you to make a security exception permanent similar to firefox.
This page discusses all browsers:
http://cedarweb.hao.ucar.edu/wiki/index.php/Help:Security_Exception