Great you had the time to localize this huge file into german. I always wanted to, but never found the time... ;)
I've taken a look at it and tried to update as much of the missing translations as I could. Finally, I could bring the number of missing strings down to 18 (from 61). Attached you can find the new file, as well as a list with all changes I've done to it. I hope someone with a SVN-account will commit it then (since I don't have one unfortunately).