The Color Red - Image Attachments and BA Forums...

If you have a look at this thread:

You will see my post (big red tomato attached to it) the red is all pixelated, this is the only forums / site so far that uploading an image it has done this too…

Forum Image Resizer bug?

no, nope.
those are jpeg compression artifacts.
change the quality (in blender) to 100, or use png