Playing around with different MIME types and namespaces

When you forget the image/svg+xml MIME type

Served as application/xml.

Served as text/html (default PHP behavior for example).

When you forget the http://www.w3.org/2000/svg namespace

When you use a namespace other than http://www.w3.org/2000/svg

Used namespace: http://www.w3.org/f00/SvGF00.

When you forget type="image/svg+xml" for your OBJECT element