Last modified: 2014-09-21 01:50:00 UTC
https://commons.wikimedia.org/wiki/File:Teatro_Municipal_de_S%C3%A3o_Paulo_8.jpg is not generating thumbnails. The original file exists: https://upload.wikimedia.org/wikipedia/commons/b/bc/Teatro_Municipal_de_S%C3%A3o_Paulo_8.jpg and renders fine. When trying to fetch a thumbnail, it was failing with "error code 137" and no actual error message. filebackend log on fluorine was uninteresting.
Probably a progressive jpg that is too big. Resaving as baseline jpg will probably fix. For reference, 137 = Out of memory.
losslessly converted (At least I think its lossless) using jpegtran -optimize -copy all -outfile out.jpg Teatro_Municipal_de_São_Paulo_8.jpg