The attached .gif is getting rejected from the api with 400 response and the message "Error uploading photo." The size is only 1.1MB, and it's a static .gif (not animated), so it should be well under the 10MB limit. Other .gif files of similar or larger size seem to get posted fine, so I'm wondering if there is something in the data for this file that causes the tumblr api to treat it as an animated .gif? I had a coworker dig around with ImageMagick, but he was unable to come up with anything, and we don't really know what we're looking for.
Just want to prevent this from happening on our side in the future. Thanks in advance!