Our site does not currently specify the following meta tag:
<meta name="twitter:site" value="@halowaypoint" />
This field is not a required field but it looks like the Twitter website is placing the avatar image element on the page anyway, with src="". This seems to work fine in Chrome but IE thinks it should actually display an image and shows as broken. See this image: http://i60.tinypic.com/2d0e4ht.png
I believe Twitter should not add this html to the page when twitter:site is not specified.
<div class="CardAttribution">
<a class="u-textInherit u-linkComplex js-openProfile"
data-user-id=""
data-screen-name=""
href="https://twitter.com/">
<img width="20" height="20" class="CardAttribution-avatar" src="" alt="">
<b class="CardAttribution-name u-linkComplex-target"></b>
</a>
</div>
The alt tag on the thumbnail also seems to have a bug in it when twitter:site is not provided.
<div class="CardContent">
<div class="SummaryCard">
<a class="js-openLink" href="https://t.co/Yg7BuzGEF9" tabindex="-1">
<img class="Thumbnail" src="https://o.twimg.com/2/proxy.jpg?..." alt="View this content on 's website">
</a>
Here is a sample tweet: https://twitter.com/sandrlem/status/458815101613518849
