I just fresh installed Ubuntu 12.04 but using my old 11.10 /home partition as the /home point for the 12.04. 
(update: in other words, the 12.04 applications should most likely use my old 11.10 application configurations. actually they are.)
Weird thing is, I can not seemed to change the default saved directory for gnome-screenshot. I tried to change the saved location from ~/Pictures to ~/Pictures/Screenshots at the first screenshot. But in the second screenshot, the saved directory is still ~/Picture.
Here is the gconf.xml:
petra@petra-laptop:~$ cat .gconf/apps/gnome-screenshot/%gconf.xml 
<?xml version="1.0"?>
<gconf>
    <entry name="last_save_directory" mtime="1335771751" type="string">
        <stringvalue>file:///home/petra/Pictures/Screenshots</stringvalue>
    </entry>
    <entry name="border_effect" mtime="1335771746" type="string">
        <stringvalue>none</stringvalue>
    </entry>
    <entry name="delay" mtime="1335771746" type="int" value="0"/>
    <entry name="include_pointer" mtime="1335771746" type="bool" value="false"/>
    <entry name="include_border" mtime="1335771746" type="bool" value="true"/>
</gconf>
The screenshot should use the last_save_directory, right? 
(update: the unix timestamp shows 1335771751 which means Mon 30 Apr 2012 02:42:31 PM WIT GMT+7 few hours after I installed the 12.04, so this should means the gnome-screenshot successfully wrote the gconf.xml file)
And I also tried changing it from the CompizConfig Setting Manager, but also gives no luck.
Is there any other way to do it? (or should I report it to the Launchpad? I've never done it before, though)
update: Here's the fstab
petra@petra-laptop:~$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    nodev,noexec,nosuid 0       0
# / was on /dev/sda1 during installation
UUID=b7b72b03-f7e6-4665-a4cd-fa0df5b2a0cf /               ext4    errors=remount-ro 0       1
# /home was on /dev/sda7 during installation
UUID=6c4d7a04-1e5f-4514-98a9-3e37867b34e8 /home           ext4    defaults        0       2
# swap was on /dev/sda6 during installation
UUID=5ecd35ad-d3bf-482c-bdac-dc3eae31ee8e none            swap    sw              0       0
update:
I just tried capturing few screenshot and saved it to other directories instead of ~/Pictures/Screenshots. Apparently the gconf.xml wasn't updated after the latest screenshots.
