Possible Error On Canada E9

I have an unused Canada E9 which seems to have a small dot in the C of Canada.Is this common? Just an ink smudge? Any discussion would be greatly appreciated.

It would not be called an "error", but it may be a plate variety. Most likely it is just some stray ink splatter, unless you can find multiple copies of the same stamp with the same artifact in the design, then it could be something else.
See this thread (or others) for some discussion of a plate variety (pay attention to the dot in the righthand '4' of the top stamp).
https://goscf.com/t/84171&whichpage=1

There may be other explanations for the stray ink (I mainly collect US not Canada so I cannot comment on the specific stamp design). An "error" would be something major, a missing color, a double impression, an inverted overprint, missing perforations, etc. An unexpected ink mark would usually be classified as a freak or an oddity, or it could be a variety.
Good catch. Certainly collectible to a specialist of the issue, but normally would not have much of a premium in value over the same regular stamp.

Thanks, ZebraMan. This is about what I thought. I was wondering if anyone else had seen this. Much appreciated.

looks like an unlisted "flyspeck" error to me. There are many such errors listed in Unitrade.