wp-leftycats is a replacement for the default WordPress function
wp_list_cats. It's ONLY aim is to move your designated feed image from the right-hand side of the category listings to the left-hand side.
If you are NOT using a feed image, and don't want it (the feed image) moved, this plugin will do you absolutely no good .:)
the modified function takes all of the same arguments that wp_list_cats takes:
Details and download are here: