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Png display weirdity

In my recent forum posting in Events, "Perseids", you'll see a thumbnail (shamelessly copied from Wikipedia) of the constellation of Perseus. Its grey (although not 50 shades)

In the post itself, the image, now displayed in full, is black, with a white line drawing in the centre.

What causes that then ?

250px-Perseus_IAU.svg.png
46
Jayefuu says: Aug 12, 2012. 6:49 AM
Fail. PNGs allow transparency but JPGs don't. Robot's converted your png to jpg and it looks like he got confused in the process. Check out the page that shows all of the size options for your image, some of them converted correctly, some didnt:

http://www.instructables.com/file/FJMYY2FH5JVOSWU/?size=SQUARE2
26
iceng in reply to JayefuuAug 12, 2012. 1:28 PM
Facinating, interestingly the original size later called LARGE but same goes inverted..
164
Kiteman in reply to JayefuuAug 12, 2012. 9:13 AM
It's not the site - if you copy and paste a PNG like that into Paint, it also comes up mostly black.

If I need to use an image like that (lacking photoshop or any such on this netbook), I tend to take a screen-shot, crop off the bits I don't need, and then cite the source as usual.
14
steveastrouk (author) in reply to KitemanAug 12, 2012. 10:24 AM
It's something to do with the site, because it handles it differently in different places !
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