Facebook-owned Instagram has disabled a feature that allowed Twitter users to view full versions of photos on the social network. Without Twitter Cards, pictures now appear distorted or cropped.
"Users are experiencing issues with viewing Instagram photos on Twitter. Issues include cropped images," Twitter warns in a tweet.
"This is due to Instagram disabling its Twitter cards integration, and as a result, photos are being displayed using a pre-cards experience. So, when users click on Tweets with an Instagram link, photos appear cropped.
Facebook bought Instagram in August for $715 million. Since then, the relationship between the picture-sharing network and Twitter has soured. Twitter recently disabled its Find Your Friends feature that let Instagram users search Twitter accounts to find possible friends.
Disabling Twitter Cards will, Instagram hopes, mean that users spend longer on the site - and on Facebook. Last month, it announced that it was to add Instagram-style photo filters to its own service.
"A handful of months ago we supported Twitter Cards because we had a minimal Web presence," Instagram co-founder and CEO Kevin Systrom told reporters at the Le Web conference in Paris.
"We've since launched several improvements to our website that allow users to directly engage with Instagram content through likes, comments, and hashtags, and now we believe the best experience is for us to link back to where the content lives."
Instagram users will still be able to share content over Twitter, the company says.