@DavidShares has another new Tumblr! He named it GIFbinge.
From the GIFbinge FAQ:
“Not all GIFs are created equally. Due to restrictions of image file sizes on Tumblr, animated GIFs over 1MB can lose their animation after being uploaded…”
I have been curious why some GIFs are animated on my Tumblr dashboard, but not on the permanent page. David answers that, and more:
“Another funny thing. Tumblr does strange things to GIFs, but basically it goes back to file size limits. Tumblr actually creates four images with every upload: Thumbnail, Low-Res, Medium-Res and High-Res, your dashboard shows the Low-Res image… the URL ends with _250.gif. The animated GIF will almost always work with…”