ENTERED THE FOLLOWING TEXT (INVALID XHTML):

 <h2>NOTE:</h2> Place <i>curly</i> braces ({}) around words requiring a blank.<BR><P></p>
For example: <HR>     Roses are {red} and violets are {blue}.  

THIS WAS CORRECTED TO   

 <h2>NOTE:</h2> Place <i>curly</i> braces ({}) around words requiring a blank.<br />
For example: <hr /> Roses are {red} and violets are {blue}.