According to the df command, as well as the disk management utility, I have a considerably smaller amount of free space versus what the logical volume manager says...

Here's the disk usage analyzer:
http://i.imgur.com/UbFWq.png

And here's the logical volume manager:
http://i.imgur.com/wvSPu.png

Which one is correct, and how do I get the two to agree?

Thanks,
-myk