style set in a symbol element is not inherited by contents.
similarly for fill or stroke
Created attachment 10492 [details]
demonstration of stroke being set, but not inherited
Ah, I think this is known.
I'm not sure how much this has to do with inheritance.
The stroke width is set on the element itself, yet is not respected during the <use>. <use> is pretty hairy, and pretty broken in WebKit, but I would have thought we would have gotten this part right. I expect we simply dont' copy the style over correctly.
*** This bug has been marked as a duplicate of 12125 ***