Extra free space is now occupied by something else after partition change

[sheilnaik]

Here's the story:

1. I had a FAT32 partition (40GB) that I wanted to delete and merge with my ext3 Ubuntu partition.
2. I used the Live CD and GParted and deleted the FAT32 partition. I also deleted the swap partition that I had. I resized the old ext3 Ubuntu partition to a larger size (50GB) and created a new 1GB swap partition.
3. Before applying changes, GParted said I would have 40GB of free space on my ext3 partition.
4. I applied the changes and rebooted. Now, I still have the same amount of free space I had before the partition changes. The ext3 Ubuntu partition shows that it is bigger, but the 40GB I added is now "Used space".

My question is, where did all the free space go? I did a cd /; sudo du -h --max-depth=1 and I got this:

sheil@sheil-laptop:~$ cd /; sudo du -h --max-depth=1
Password:
48K     ./lost+found
440M    ./var
15G     ./media
14M     ./etc
4.4M    ./bin
9.4M    ./boot
120K    ./dev
5.0G    ./home
4.0K    ./initrd
111M    ./lib
4.0K    ./mnt
120M    ./opt
498M    ./proc
3.5M    ./root
11M     ./sbin
4.0K    ./srv
0       ./sys
104K    ./tmp
2.1G    ./usr
23G     .

The /media directory is large because it has my other NTFS Windows XP Partition on it, so ignore that. Two things have me confused though:

1. There are 23G of used stuff in the root directory of the file system? Nautilus did not show this when I viewed the file system as root (via the gksudo nautilus command).
2. The du still did not account for the 40GB of space that I added from the FAT32 partition.

I have attached a screenshot of my GParted window so you can get a better understand of how my system is set up. Any and all comments/advice would be useful. Thanks!

EDIT: Just to clarify, my Trash (for all users, including root) is empty. Also, I had some stuff (over 30GB worth) on the FAT32 partition before I deleted it. However, I never deleted the data and sent it to my Trash...I just deleted the partition using GParted on the Live CD.