title: difference between lxml and html5lib in the context of beautifulsoup
body: <p>Is there a difference between the capabiities of lxml and html5lib parsers in the context of beautifulsoup? I am trying to learn to use BS4 and using the following code construct --</p>
  
  <pre><code>ret = requests.get('http://www.olivegarden.com')
  soup = BeautifulSoup(ret.text, 'html5lib')
  for item in soup.find_all('a'): 
      print item['href']
  </code></pre>
  
  <p>I started out with using lxml as the parser but noticed that for some websites the for loop just is never entered even though there are valid links in the page. The same page works with html5ib parser. Are there any specific type of pages that might not work with lxml? </p>
  
  <p>I am on Ubuntu using python-lxml 2.3.2-1 with libxml2 2.7.8.dfsg-5.1ubunt 
  and html5lib-1.0b3</p>
  
  <p>EDIT: I updated to lxml 3.1.2 and still see the same issue. On a mac though running 3.0.x the same page is being parsed properly. The website in question is www.olivegarden.com</p>