Problem with raspbian and german umlauts

gistfile1.txt

soenke♥kellerautomat:~$ ssh xbian@mediarasp1
------------------------------------------------------------------
     Y88b d88P  888888b.   8888888        d8888 888b    888
      Y88o88P   888  .88P    888        d88P888 88888b  888
       Y888P    8888888K.    888       d88P 888 888Y88b 888
       d888b    888  "Y88b   888      d88P  888 888 Y88b888
     d88P Y88b  888   d88P   888    d8888888888 888   Y8888
    d88P   Y88b 8888888P"  8888888 d88P     888 888    Y888 
------------------------------------------------------------------
XBian v1.0B2 - XBMC on the Raspbery Pi, Bleeding Edge, 2012 - 2013
Find us at: http://www.xbian.org http://github.com/xbianonpi/xbian

XBian and all its packages are distributed as free software; for
important license, terms and conditions, please refer into
/etc/xbian_copying. XBian comes with ABSOLUTELY NO WARRANTY, to the 
extent permitted by applicable law.

! rpi-update usage at your own risk. can break your xbian setup !
Last login: Sat Jun 14 15:26:38 2014 from 192.168.1.105
xbian@mediarasp1 ~ $ locale
LANG=en_US.UTF-8
LANGUAGE=
LC_CTYPE=C
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=
xbian@mediarasp1 ~ $ touch bläh
xbian@mediarasp1 ~ $ ls -al bl*
-rw-r--r-- 1 xbian xbian 0 Jun 14 15:27 bl??h
xbian@mediarasp1 ~ $ file bläh
bläh: empty
xbian@mediarasp1 ~ $stat bläh
  File: `bl\303\244h'
  Size: 0         	Blocks: 0          IO Block: 4096   regular empty file
Device: 14h/20d	Inode: 42889       Links: 1
Access: (0644/-rw-r--r--)  Uid: ( 1001/   xbian)   Gid: ( 1001/   xbian)
Access: 2014-06-14 15:27:04.195507818 +0200
Modify: 2014-06-14 15:27:04.195507818 +0200
Change: 2014-06-14 15:27:04.195507818 +0200
 Birth: -
xbian@mediarasp1 ~ $ 

Looks like a problem with bash: http://unix.stackexchange.com/questions/22435/how-to-fix-character-encoding-in-bash-arch-linux

xbian@mediarasp1 ~ $ ä
-bash: $'\303\244': command not found
xbian@mediarasp1 ~ $ ö
-bash: $'\303\266': command not found
xbian@mediarasp1 ~ $ ü
-bash: $'\303\274': command not found