Canada Copyright 
I have a question for you. I want to nominate an article for Featured status, but I was wondering if photos under the Canada Crown Coypright status is acceptable? Thanks.  (Sound Off) 
The Canadian Crown Copyright is borderline: it appears to prohibit commercial use, and it may or may not permit modification.  It's still freer than "fair use", so if it's a choice between the two, the Crown Copyright image is better.  Such images should still be used sparingly.  The Canadian Heraldic Authority article is a good example of where Crown Copyright images can be used (although since it's the text description of a coat of arms that's definitive, not the visual representation, anyone could draw up a depiction of one of those coats of arms and release it under GFDL).