Just like bug 3723 etc. The german market is pretty big, and we have a few persons that are having problems with the layout, as discussed on the mailing list.
Fixed in 25414.
Does not work; AltGr symbols does not work. I believe this is because Mode_Switch is missing from the map.
Quoting bug 3522:
Re-fixed in 25560; Mode_switch was left out. Also including multimedia keys
Will test again with nightly build, though.
Seems to work.