File:SomeImage links on en-beta correctly find images from http://commons.wikimedia.beta.wmflabs.org , e.g.
http://en.wikipedia.beta.wmflabs.org/wiki/File:A_nice_picture.jpg shows the file info from commons-beta and links to it on upload-beta. Yay!
But links in the explanation
"This is a file from the Wikimedia Commons. Information from its description page there is shown below.
Commons is a freely licensed media file repository. You can help."
go to production commons, not commons-beta.
I think this happens because the http://en.wikipedia.beta.wmflabs.org/wiki/MediaWiki:Sharedupload-desc-here message imported from enwiki either hardcodes commons.wikimedia.org, or doesn't support its override.
There should be a template or magic word for {{INSTANTCOMMONSNAME}} {{INSTANTCOMMONSURL}}, but I'm far from expert on the setup.
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