[navit] Crash with sdl + internal gui

[Marcel]

Hello,

I'm trying to use navit with sdl driver and the internal gui (something 
told me thats faster, don't know where I got that from). gtk_drawing_area 
works fine, so in principle everything's fine. Once I change the driver to 
"sdl", navit crashes like this: http://pastebin.ca/1443950
Do I need some additional library? The backtrace isn't too helpful for me.
sdl-image is installed...

--
Marcel