if people tell you to lower the size, whether resolution or file size, don't bother pls
it may eventually make it work, but only by coincidence, because that isn't the cause of the problem. what always has worked for me is saving it with different settings a couple of times. this gets past the issue, without compromising the quality of the image
it's easy with the GIMP. usually I just uncheck all of the options, and if that doesn't work, check them all again, and if that doesn't work, I'd start flipping them each one-by-one until it did, but one of them has always worked before I got to that point
it happens because the SMF developers tried and failed to write malware detection. it constantly gets false positives, and they won't fix it because they're Perfect and So Good at Programming and the problem is obviously your image editor and not their homemade antivirus
