Yep, can confirm now. The latest DCS screenshots in PNG format can’t be uploaded to Twitter, imgur.com etc or here, as they are rejected as corrupt images. I’ve set the PNG setting not to turn into a JPG to work around this for now here on the forums, but it can mean that large images get posted into threads and then slow them down, i.e. people on mobile/tablets etc.
If anyone has any performance problems in a screenshot thread or something then please holla and we can put the setting back (with the workaround you’ll need to convert to jpg like @bignewy has shown above).