Hello,
First I wanna thank you for your good plugin, it exactly fits my needs.
For me worked with "wp-content/uploads/2009/07/feedicon12x12.gif" but just on the main page, if you go to an especific article the it disappear de icon and instead shows de RSS link.
I have exactly the same behavior than Neodian.
I tried to add a leading / but it doesn't work at all.
Actualy on my blog I left without the leading / that allows me to have a clean index.
As soon something changes in the url (entering a post/category or anything), the image link goes broken.
I'm using latest wordpress stable 2.8.2 and version 2.0.3 for Extended Category Widget.
It would be easier if we could just configure an URL instead of this problematic path.
Kind regards