Avatar cropping not working correctly

Hey all, I searched but couldnt find an answer.

When I try to crop a photo to use as an avatar, be it a user avatar or blog avatar, the feature does not work correctly. The cropping box usualy appears at the top left of the screen way away from the image that was uploaded. I cant move the box down to the image and it is almost impossible to crop the image, or even select it.

I wish I could explain this better but maybe you know what I am talking about?

I am not using BuddyPress, the site is FightLogs.com.

Anyone got any help for me?