Ubuntu :: No Write Permission On Pendrive After Automount

cat /etc/fstab
mount
ps -A
ls -al /media/
dmesg
groupsfootnotes

My problem:
When plugging in a pen drive it will be automounted, but only root (who owns it) has write access to it. Other users only have write access. (Neither my user, nor an unmodified test user)

My aim:
I want to be able to write on my pendrive without any additional manual work after plugging it in (iirc that is default on a standard ubuntu install).

Possible causes:
I once had a time where I wanted everthing to be minimal. Might be, that I removed something in connection with my problem. I reinstalled everything that came to my mind and could be connected to that problem w/o success. I merely removed stuff than editing stuff (never touched /etc/fstab or /etc/udev/rules.d/*). S
So I think I am missing some kind of service, that manages my (user?) permissions or so.

I use:
Ubuntu 10.04 (initially a kubuntu but I remove nearly everything Qt/KDE stuff) fluxbox (but most gnome services are active).

I tried/checked:
check my automount setting[1] - did not change the behaviour
media_automount - is checked
media_automount_open - is checked
usbmount - is installedntfs-config - did not help (even after reboot)
manual mount[2] - worked, but i don't want to do that everytime I plug in a pendrive
gksudo users-admin (made sure that amongs others the following entries are checked)
Access external storage devices automatically
Administer the system
Mount user-space filesystems (FUSE)

I didn't try:
chmod - seems to be only used for ext* fs
edit /etc/fstab - seems not to be supposed for such variable things like pendrives
- changing file systems for same pendrive
- different number of pen drives
- every pendrive needs its own fstab entry
udev rules - I was told to write some, but I am reluctant because- I never did that before (so I also didn't mess them up)

Additional info:
Code:
benedict@box:~$ cat /etc/fstab
# /etc/fstab: static file system information.
# Use 'blkid -o value -s UUID' 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).....