title: Ruby 1.9 regex encoding
body: <p>I am parsing this feed <a href="http://www.sixapart.com/labs/update/developers/" rel="nofollow">http://www.sixapart.com/labs/update/developers/</a> with nokogiri and then running some regex on the contents of some tags.  The content is UTF-8 mostly, but is occasionally corrupt.  However, for my case I don't really care and just need to pass the right parts of the content through, so I'm happy to treat the data as binary/ASCII-8BIT.  The problem is that no matter what I do, regexes in my script are treated as either UTF-8 or ASCII.  No matter what I set the encoding comment to, or what I do to create the regex.</p>
  
  <p>Is there a solution to this?  Can I force the regex to binary?  Can I do a gsub without a regex easily?  (I am just replacing &amp;amp; with &amp;)</p>