Today, we found out that Tumblr changed one of its post attributes from data-root-id to data-root_id. We depend on that attribute to figure out if a post belongs to the same reblog chain of a post you’ve already reblogged. This change also broke PostBlock, so we fixed that as well.

Currently, our fixed code is awaiting review before it gets pushed and becomes available to you all.

If you have any questions, please send us an ask on our support blog or leave a comment on our pending pull request.