Thread:Silentfreeze/@comment-3498723-20130621092737/@comment-8810399-20130622021127

Thanks all for your help! Silentfreeze, there appears to be something about png screenshots that messes up the uploading system -- here's the workaround I use:

1. Get the screenshot, do any needed cropping/rotation, save as TIFF (to remove transparency/other png stuff)

2. Re-save the file as a png (Wikia doesn't support tiff uploads)

3. Try uploading again

This has worked for me so far, you might want to give it a shot too.