Created attachment 493353 [details]
"File system" tab from Gnome-System-Monitor

Description of problem:

Gnome-System-Monitor (Gnome 3) seems to think that /tmp and /var/tmp are on separate partitions than /. This causes it to report free space incorrectly. My / is 7.3GB (4.5GB free), but Gnome-System-Monitor adds / + /tmp + /var/tmp together to think that I have 13.5GB free. On the "file systems" tab, the three directories should probably not show up separately since they are on the same partition.
Switching to the "system" tab is where problems really occur. I have a 160GB (manufacturer's number, actually less) that is split between / (7.3GB) and /home (140GB). The "system" tab should report ~147GB of total capacity. However, it actually reports 190.5GB. I have no idea where that number comes from. None of the following combinations seem to add up to 190.5GB.

~$ df -h 
Filesystem            Size  Used Avail Use% Mounted on
rootfs                7.4G  2.9G  4.5G  40% /
udev                  1.5G     0  1.5G   0% /dev
tmpfs                 1.5G  1.1M  1.5G   1% /dev/shm
tmpfs                 1.5G  680K  1.5G   1% /run
/dev/sda1             7.4G  2.9G  4.5G  40% /
tmpfs                 1.5G     0  1.5G   0% /sys/fs/cgroup
tmpfs                 1.5G  680K  1.5G   1% /var/run
tmpfs                 1.5G  680K  1.5G   1% /var/lock
tmpfs                 1.5G     0  1.5G   0% /media
/dev/sda5             140G   44G   89G  34% /home
/dev/sda1             7.4G  2.9G  4.5G  40% /tmp
/dev/sda1             7.4G  2.9G  4.5G  40% /var/tmp
/dev/sda5             140G   44G   89G  34% /home

Version-Release number of selected component (if applicable):
3.0.0

How reproducible:
It's persistent across reboots. However, I have not reinstalled the Fedora 15 alpha, which is fully updated as of 11:30 EDT April 19th.

Steps to Reproduce:
1. Launch Gnome-System-Monitor
2.
3.
  
Actual results:
190.GB of total capacity

Expected results:
146.7GB

Additional info:
Screenshots attached.