I do find it interesting that there has been trouble equally in Canada and the US. I had believed that Canada was much more tolerant and less paranoid when it came to this kind of stuff. I guess it isn't safe anywhere anymore.
I don't think it's been equal. I've certainly heard a lot more stories coming out of the US than I have in Canada. In fact, the only incidents I've heard of photographers being hassled in Canada, both involve the US embassy in Ottawa. I'm sure there have been other incidents, just not that I've heard.
My understanding is, there have been a lot more restrictions put in place in the US about what you can and can't photograph. For instance, bridges, waterways, subways, train stations etc (please correct me if I'm wrong, just what I've been reading, and we all know how reliable information on the internet is . :: )