It seems like the problem I’m facing is a problem that several people are facing. Reading other topics I have the feeling that the problem should have been solved last month but unfortunately it still doesn’t display properly for me.
The card validator displays the picture as I want it to be.
On my Twitter page, the tweet is shown as a small image with the text next to it (like it is for a summary)

The code I’m using to post the tweet is
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:site" content="Photona">
<meta name="twitter:title" content="Dama dama">
<meta name="twitter:text:description" content="bekeken: 2 keren">
<meta name="twitter:image" content="https://photona.org/wp-content/uploads/wppa/409.jpg">
The tweet is displayed in the same way regardless if I’m using Internet Explorer, Chrome or Firefox.
When I post a tweet manually, it displays nicely as expected.
What can I do to enforce that the tweet is displayed as a large picture with the text below it?
The original picture is approximately 900 x 700 pixels which seems in line with the requirements.
Looking forward to your reply.
Dirk Claesen
http://photona.org