Uploaded to a server and viewed with the same Internet Explorer on the same computer that coded it.

You'll need to include some special instructions for IE.
The RWD grid I'm using has this included:


IE just has to be different
I'd leave that HTML5shim... in place to avoid problems with HTML 5 elements that might not be understood by all browsers.

Thanks for the help Paintbrush - appreciate it...

Tom, thanks for the follow up about the map/Iframe. Will experiment with some paddings/margins around my map (and FB-Twitter widgets).

Chris... it seems there are all sorts of things that need to be included to make sure all browsers and all their various versions will be able to cough up the HTML5 as intended. I'm just learning this stuff, so this is not expert advice, but it seems to be a common practice to start with some sort of "css reset"
( http://meyerweb.com/eric/tools/css/reset/ ), so you eliminate browser inconsistencies – no matter what version of x/html you may be using.

Hope you're having as much fun as I am