Quote:
Originally Posted by bobskie
EDIT - the picture seems to go strange when opened, try double clicking to open in a new tab which works or if you are on mobile hold down and click open in new tab.
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Your picture is on a transparent background. It shows up cleanly in the thumbnail, against the white background of the forum post. But the overlay window has a black background, which shows through the transparent background of your image leaving it unreadable. It becomes visible again, against the white background of a new browser tab (unless you changed the default colours in about
:config).
This is something you can alter in your favourite graphics editor. Quick fix is just to save an image as .jpg, which does not support transparency -- though it may cause visible artifacts on line art, as the compression was designed for photographs. Try it and see.