We have many reports of "Error generating thumbnail: The source file for the specified thumbnail does not exist", which for some reason now are displayed as e.g.
Error generating thumbnail
The source file 'Bandera_de_Castrillón.svg' does not exist.
https://upload.wikimedia.org/wikipedia/commons/thumb/8/8a/Bandera_de_Castrill%C3%B3n.svg/500px-Bandera_de_Castrill%C3%B3n.svg.png
This seems to affect all uploads in some specific timespans, apparently unrelated to the migration, for instance
https://commons.wikimedia.org/w/index.php?title=Special:ListFiles&dir=prev&offset=20130123114541&limit=30&user=DcoetzeeBot
See:
https://commons.wikimedia.org/w/index.php?title=Commons:Village_pump&oldid=88705842#.22Error_generating_thumbnail_.E2.80.93_The_source_file_for_the_specified_thumbnail_does_not_exist..22
https://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_%28technical%29&oldid=534688091#Images_not_rendering
Aaron is debugging this right now.
Version: unspecified
Severity: major
URL: https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Three_Hares_Symbol_-_Map.svg/320px-Three_Hares_Symbol_-_Map.svg.png