We have resolved the image preview problem and deployed a fix. Please refresh Slack with Cmd/Ctrl + R to fetch the update. If you have any further hassles, please let us know at firstname.lastname@example.org. Apologies again for the disruption.
8:51 PM PST
We're still digging into the image preview issue and chasing down some leads. Thank you for bearing with us.
8:42 PM PST
We are investigating some issues with image previews in Slack. We're very sorry for the trouble. We're on the case.
8:12 PM PST