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HTML / CSS.  I just found a way to change this setting in my server host (GoDaddy), so it looks like that's all I have to do.  It doesn't appear that I would need to change anything in my htaccess file. I take the following statement from Google as meaning we should only use the default 404 setting and not direct it to the homepage?  "Another example is when a site redirects any unknown URLs to their homepage instead of returning 404s. Both of these cases can have negative effects.............."   I guess I'm a little thrown off by the word "any urls."