Panflute using large amount of RAM

Using the "top" command, and sorting by memory usage, Panflute is the 3rd-highest process; only Firefox and Thunderbird use more RAM. I use Panflute with Banshee, but even after Banshee and all other players are closed, Panflute still uses a lot of RAM. I'm using Panflute version 0.7.0. Here are the first few lines of output from the "top" command:

top - 16:11:01 up 6 days, 57 min, 26 users, load average: 0.65, 0.65, 0.60
Tasks: 309 total, 1 running, 308 sleeping, 0 stopped, 0 zombie
Cpu(s): 28.3%us, 3.1%sy, 0.0%ni, 68.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 8118380k total, 7466292k used, 652088k free, 2396368k buffers
Swap: 2048280k total, 29728k used, 2018552k free, 2436236k cached

  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND

20870 username 20 0 1008m 465m 30m S 47 5.9 0:53.32 /usr/lib/firefox-3.6.12/firefox-bin -no-remote

31870 username 20 0 885m 210m 20m S 0 2.7 15:52.34 /usr/lib/thunderbird-3.1.6/thunderbird-bin

 2668 username 20 0 541m 96m 7288 S 0 1.2 1:04.64 python /usr/lib/gnome-applets/panflute-applet --oaf-activate-iid=OAFIID:GNOME_Panflute_Applet_Factory --oaf-ior-fd=40

 2629 username 20 0 699m 83m 12m S 0 1.1 5:50.47 nautilus --no-desktop --browser

 3451 username 20 0 649m 72m 18m S 0 0.9 6:43.83 /opt/google/chrome/google-chrome

 3503 username 20 0 868m 59m 5120 S 2 0.8 115:03.01 /opt/google/chrome/chrome [...]

 1562 root 20 0 253m 59m 17m S 5 0.8 187:17.48 /usr/bin/X :0 -nr -verbose [...]