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+++ This bug was initially created as a clone of Bug #20177 +++ The img src attribute and srcset behaves different when presented with spaces: for example, "Screenshot 10.2.2012 100 1x 2x Funny Cat.jpeg" in @srcset results in "Screenshot" as the candidate. However, when fed to img@src, the resource name is parsed as expected. Confirmed by: http://responsiveimagescg.github.com/picture-refimp/demo/?srcset=Screenshot+10.2.2012+100+1x+2x+Funny+Cat.jpeg
Yeah, but there's not much we can do about it. In any case, they're non-conforming in both cases, so it's not really a big deal.