Gaussian Blur = 0 still blurry

Could someone please help me with a search? I'm trying to animate a blur, but at the first keyframe (blur amount=0), it's still noticeably blurry...which will result in a jump during the playback. I disable the blur and it's normal. I've tried searching "gaussian blur amount" and got 5 pages of nothing related. Any ideas?
Thanks.
Jonathan
Message was edited by: synergy1

Thanks for the reply, Tony.
Here's links to images of what I'm talking about. First is the normal.
You can see that the defocus filter is not checked, so this is with the filter off.
Now, compare that to the defocus. example.
You see that the filter is activated and set to 0. But notice that the word "Argentina" is a bit blurry and it's bounding box is a bit bigger. When I turn the filter on and off I can see it move up and down. It's not a render issue because I've rendered it and it's still blurry.
What am I missing?
Jonathan
Message was edited by: synergy1
Message was edited by: synergy1
Message was edited by: synergy1

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Gaussian Blur = 0 still blurry

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