Possible Breaking Change between SVG1 and SVG2

Hi,

Ref: https://github.com/w3c/svgwg/issues/367

I have been giving this contact address after raising bugs with a number of
browser developers and getting their feedback.

The issues I raised with them was concerning a browser incompatibility
which I found when trying to style 're-used' SVG elements.  I was informed,
that the technique I was attempting did not work on Firefox as they follow
the SVG 2 spec.  After raising the issue with Chrome, I was hoping they
could set Mozilla straight.  Unfortunately, Firefox is correct and a new
issue was created to update Chrome to the same spec.  Although the
technique currently works in Chrome and a number of other browsers, when
they update, the styling will fail.

I have recently raised the issue on GitHub (
https://github.com/w3c/svgwg/issues/367) and go into more detail, with
CodePen examples, demonstrating what I was trying to achieve.

I'm not sure is this breaking change was intended, or an unfortunate
side-effect, either way, I just want to style my inline-svg's with as
little duplicate code as possible!

I hope you are able to follow my ramblings and either update the spec to
allow re-used SVG's to have custom styling applied, or perhaps document
another solution to this problem.

Thanks for your time,
Pete