ed.14:39 - it appears the playlist image is dynamic [a.k.a. overwritten] when re-generated. interesting.
ed.21:59 - i've decided to put the last.fm playlist image in my header entry, since it constantly re-generates to show my current "now playing" list. that way, it will always be the first thing you folks see if you happen to go to my LJ. yay, you always know what i'm listening to!