I've been meaning to add the orange RSS button back to my menu for a while. However I've been reluctant to upset my finely-tuned but fragile CSS/Radio Userland code synchronisation, by throwing a gauche graphic into the mix. But today I discovered a nice CSS method which solved the problem neatly - the sort of CSS you could take home to meet mother, very civilized and well-behaved. This was thanks to Don Park. Actually I used Richard Soderberg's code fragment, but I found it in Don's comments.
It's brilliant, now I have the familiar (to geeks anyway) orange RSS button - but there is no graphic! It's pure CSS baby.