Norway Maple Black Spots

Would I be correct in assuming that the black spots on the leaves of our Norway Maple are Tar Spots? They certainly seem to fit the description. The following are links to pictures I have just taken.
http://i11.tinypic.com/2uz7bxj.jpg
http://i11.tinypic.com/2sacxuh.jpg
Thanks.
Roger Ontario, Canada
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Roger said:

Looks like a correct diagnosis to me.
--
Pat in Plymouth MI ('someplace.net' is comcast)

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