If I take KDE out of this situation:
[1] There is no "Automount at Login" under System Setting or anywhere else I can find.
[2] Ubuntu doesn't automount anything unless it's in fstab, you created a script to do the mounting, or it's an external storage device.
It may appear to the user to be auto mounted since there is a link to the unmounted partition under Devices in Nautilus but it's only mounted when selected. The biggest clue to this being the case is that permissions to access the ntfs partition is limited to you alone.
And except for the mount point it would mount it just like you posted:
There's only one teensie little problem: it's mounting it in the wrong place./dev/sdb1 /media/DATA fuseblk rw,nosuid,nodev,allow_other,default_permissions,bl ksize=4096 0 0
Prior to Ubuntu 12.10 the system would mount these partition to /media/LABEL just as you posted but from Ubuntu 12.10 on it mounts to /media/$USER/LABEL so your line should look like this:
Curiouser and curiouser./dev/sdb1 /media/your-user-name/DATA fuseblk rw,nosuid,nodev,allow_other,default_permissions,bl ksize=4096 0 0
Sure you don't already have an entry for this in /etc/fstab? By any chance is this a Wubi install?
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