[Plugin: WP CSS] problem with url of square inside list bullet

Once i enabled wp-css i noticed i had lost my bullet image. the css associated with it was

square inside url(images/arrow.gif);

Any other url in a css did change to the full address link however the ‘square inside url’ instead attempted to look for the file within the wp-css plugin folder. a makeshift solution was to put the picture into that folder but i was wondering if there is a better way.

thanks in advance.

ian