when i use photo shop i go to image change it to indexcolour then save it for the web optimise it to 30k using PNG, then when you up load it dont resize it for the web using imageshack then it should be ok when you change it to index you will be asked how you wish for it to be saved so palete = local selective colours 256 forced = black and white tick transparancy box opions dither = difussion amount 75% tick box to preserve colour then go to save for the web etc hope this helps you making sigs, you are doing great