On 23/05/2014, Crockford, Ally a.crockford@nls.uk wrote: ...
Example link: http://commons.wikimedia.beta.wmflabs.org/wiki/File:Imaginative_depiction_of...
This looks like a possible bug worth reporting if you can duplicate this error. I have not seen this on my beta tests. I am uploading in the production environment right now, see [1] for an example just minutes ago, with no problems in viewing very large files.
I'm wondering if something has been rolled out in beta that is affecting thumbnail creation.
Looking at your example, I can view a much larger thumbnail by going via the media viewer, see [2], but this does not seem to match the maximum dimensions available on the image page. So, yes, weirdness.
1. https://commons.wikimedia.org/wiki/File:The_spirit_moving_the_Quakers_upon_w... 2. http://upload.beta.wmflabs.org/wikipedia/commons/thumb/c/ca/Imaginative_depi...
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