How do you change profile images on wikis?

Curious to know how I can change profile images on Wiki if I am able to find better images for certain characters?

Live editors after certain point value can change them.

@killerz: I have 5,000 points. Why aren't my changes appearing automatically?

@nefarious: Someone has put you back in the queue.

@killerz: What does that mean?

@nefarious: Note says: having trouble with new issue submissions.

I haven't looked more deeply into it though.

@killerz: Ok. Is it fixable?

@nefarious: Yeah mods can change that, but I don't want to just overrule other mod's decision on a whim. I need to talk to him first.

@killerz: Ok.