I did a little hack to fix the df command:
Added this 2 lines to /etc/mtab in debbie

/dev/loop0 / ext2 loop,noatime,nobh,nodiratime 0 0 /dev/mmcblk0p1 /home/user/MyDocs vfat rw,noauto,nodev,noexec,nosuid,noatime,nodiratime,u tf8,uid=29999,hortname=mixed,dmask=000,fmask=0133, rodir 0 0
/dev/mmcblk0p1 /home/user/MyDocs vfat rw,noauto,nodev,noexec,nosuid,noatime,nodiratime,u tf8,uid=29999,shortname=mixed,dmask=000,fmask=0133 ,rodir 0 0

I found the bug that made lxde not start after setting locale with:
dpkg-reconfigure locales

The /usr/bin/xephwm5 had a line:
export TWOWIN=`wmctrl -l | grep -i Information | awk '{print $1}'`

When setting locales for norway the output changed to Informasjon. So when I cahnged the line to:
export TWOWIN=`wmctrl -l | grep -i Info | awk '{print $1}'`

it worked, and lxde no longer hangs in this while loop.