I saw a file which is rendering as 0x0. It is https://commons.wikimedia.org/wiki/File:CJDB_-_Comiss%C3%A3o_de_Juristas_respons%C3%A1vel_pela_elabora%C3%A7%C3%A3o_de_anteprojeto_de_Lei_Geral_do_Desporto_Brasileiro_(31178107396).jpg. I tried reuploading it with the original resolutions (2784x1848), but no success. I don't know of any other file suffering with this unknown bug.
@Pokefan95: You increased the priority of this task to "high". As priority reflects reality and does not cause it, please elaborate why this task is rather urgent. Please do not change priority if it does not confirm with Setting Task Priorities. Resources of teams are limited when it comes to working on requests. We want to be realistic about communicating what is being worked on, to maximize the impact of changes. Practically, this often unfortunately means assigning a low priority to many tasks.
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This might be the same problem as T148606: File does not thumbnail, doesn't have extracted metadata, has reported zero width/height (due to garbage bytes between JPEG sections) (which is nearly fixed). I'll look into it.
It's the same problem. There's a single garbage null byte at position 6793, which technically makes this file an invalid JPEG. I fixed the file by replacing it with an FF byte (which means that it should be just ignored) and uploaded a new version. T148606 has a general solution for this.