Validator is having trouble detecting twitter:description meta tag, even though it's there


Hi there,

We have an approved card, and recently noticed that our cards haven’t been working. I’ve put this URL through the validator, and it invalidates on the twitter:description meta tag, although it’s right there. Any ideas/help as so why this is happening?

Here are the relevant meta tags:

  <meta name="twitter:card" content="summary_large_image">
  <meta name="twitter:image:src" content="">
  <meta property="twitter:title" content="The Patron Saint of Liars">
  <meta property="twitter:url" content="">
  <meta property="twitter:description" content="Since her first publication in 1992, celebrated novelist Ann Patchett has crafted a number of elegant novels, garnering accolades and awards along the way. Now comes a beautiful reissue of the...">
  <meta name="twitter:domain" content="">
  <meta name="twitter:site" content="@Oyster">
  <meta name="twitter:app:id:iphone" content="id672803850">
  <meta name="twitter:app:id:ipad" content="id672803850">
  <meta name="twitter:app:url:iphone" content="oysterbooks://book/ctsyU59FTwjb9sjDbUS743">
  <meta name="twitter:app:url:ipad" content="oysterbooks://book/ctsyU59FTwjb9sjDbUS743">

(Also, I noticed that some successful sites use the property attribute on the meta tag: view-source:




I’ve just tested and it looks like it works. Sorry for the delay!