Bumping OptimizedImage::VERSION is apparently not that safe. This was done recently in
https://github.com/discourse/discourse/commit/570877da3c39707c2101c3510fab1509fb8ba3e2
What happened here is that the user used the following URL in the post:
Note how the optimized image version is included as _1_ in the URL. If I change that to _2_, the image loads properly.
