Yes, yesss. If your av is meant to actually represent something recognizable, you should fix it. I'd suggest that JPEG image format is a bad idea for avs if it's not necessary. If you can you should use a lossless format such as PNG which won't make the image blurry like JPEG. The image seems hard to recognize anyway, is there some kind of angry face or am I seeing angry faces out of the, er... fire?
About the sig, check the rules in case it's too big. I'm not saying it is, I'm too lazy to check it myself. As for the quote, I personally think you made a great choice.
