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Be Careful What You Name Your Class And Id Selectors

  <style>
   P.author {font-style:italic}
   P.1name {size:12pt; font-family:arial}
  </style>

  <body>
    <P class="author">Mark Twain</P>
    <P class="1name">Quote Text Here</P>
  </body>

All versions of Netscape ignore the P.1name style definition because it begins with a number, while Explorer displays it as you expect. Under CSS1 specifications, selectors can't start with a number, but CSS2 rules do allow it. Just follow the CSS1 naming conventions to avoid problems.