I just made a new partition for my home folder. It is a 120GB partition, and it somehow is 69% full(according to df), and according to gparted, it only has 12GB left. My home folder only contains 16.9GB of data. There is something horribly wrong here, and I should have at least 100GB left.

I tried a fsck -f /dev/hdb1(the partiton in question) on the Dapper Live CD and it turned up nothing. Is there a way to fix this without moving my data back to the original root partition and recreating the new home partition?

Besides my home directory, there is nothing else in the partition. What could possibly be taking up so much space, and why is df only reporting 69% full when gparted is reporting somewhere along the lines of 90% full?

Data, we need (hard) data.(as root)

syg00 is right, more info needed.

Did you make or did you enlarge an existing partition, if you enlarged an existing partition you may have to run a simple command to have Linux expand it's filesystem to occupy remaining area.

If you look at kdiskfree (KDE) through main menu/System/More Applications/kdiskfree and your /home partition is /dev/hdb1 (example), then the command would be:

resize2fs /dev/hdb1

And wait as Linux formats remaining area of partition.