Okay, I've fixed that now. I didn't know about that site feature, that's very handy.

Really nice work! You still have some semi-transparent pixels which should be removed (you can check it under Features/Image Specs Tool - copy/paste image location in it).

@ eishiya: That might be a better idea. I'm not used to leaving entirely transparent backgrounds on sprites (either white, a color, or an "actual" background), so the idea almost never occurs to me, but I know it's the norm here on PJ so I'll try to remember better next time. I'll probably leave some around the logo and let the area behind the characters be transparent. I'll go ahead and put through an updated version reflecting this.

edit: I went ahead and did that.

I don't think the bright yellow background makes the characters look their best, since it makes the AA not work, and is blinding when zoomed in D: I think transparency might be better, even if it means the logo won't look as good. Could have the best of both worlds by having a background only for the logo (e.g. a very thick stroke, or something like a paint streak behind it).