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For those who are interested…

The character that was causing the trouble was a copyright sign found in the AdSense plug-in (in the header section of the blog). I had to go to the Adsense editor to replace the “©” with a “©”

Thanks again for the suggestions.

Aha! I tried the
blah: blee method
and it worked!

Seriously, thanks very much.

img {
border: 0;
margin: 10px;
)

did work.
And thank you “basketball” for your response, too.