As of late this has kinda become a bit of an issue so I'm hoping this may help some new members. First of all, for anything related to fanart view this topic: http://aikatsustars.wikia.com/wiki/Thread:52202
Now, as a friendly reminder, here are some rules to keep in mind with images:
1. PLEASE FOR THE SAKE OF ALL THINGS GOOD do not upload duplicates. A duplicate is a copy of an image already on the wiki, Jo gets really testy if you do this, and I'm putting it mildly.
2. Modified screenshots/images do not count as an official image for the series and therefore would be a copy and is un-needed in an image gallery. So please do not try to justify adding them by saying "it's modified/rendered, so it's okay to put in the gallery when it looks so different". No it aint.
3. Anyone caught doing things like this will be warned, but do not expect a kind scolding if you do it repeatedly. Before uploading an image please try to make sure it's not already on the wiki first. Do this by finding the page the image would be on, or even check the IMAGES page beneath the "explore" button on top of the page.
If you are unable to find an image, I'd suggest asking a more experienced user beforehand. But in the case that you accidentally do upload a duplicate (it happens, I did it once), the best thing you can do is contact an Admin when you find this out. If you do that I promise you won't get into trouble, or at least as much.
Now, because people seem to struggle to understand how to add images to certain things, I have gone ahead and made this helpful picture to explain it easily. Hopefully it helps someone... click on it to make it full size, I had to shrink it to avoid enlarging the page.
Now, if I forgot anything feel free to leave a comment. Or just tell me if my guide helped at all~