Instagram photo-rendering issue
Update: Dec 9, 3:10pm PST
Instagram has disabled photo integration with Twitter. As a result, photos are no longer appearing in Tweets or user photo galleries.
While tweeting links to Instagram photos is still possible, you can no longer view the photos on Twitter, as was previously the case.
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Users are experiencing issues with viewing Instagram photos on Twitter. Issues include cropped images. 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.