At the time of this post, working with SVG in Ember can be a PITA to say the least.
The issues faced in Ember with SVG are the same issues faced by most frameworks. In fact, as of right now (now meaning while I'm typing this), there are no stable versions of JavaScript "frameworks" that fully support SVG properly. Angular, Ember, React and Polymer all have some pain around handling SVG. Some of them attempt to handle it, React for example, but there are certain cases where it will still break.