This may not be a problem other than user error, or something I don't understand…
Last night I let a playlist run all night (10 hrs) and when I woke I was down to 386MB of RAM. The dump in .84 fixed the glaring problem, but it seems it's still chomping a lot of memory. Is this normal, or is there another culprit? No other programs or processes were running, outside of normal background programs that do not eat away that much RAM.