Unfortunately, the upstream developers have marked this bug as "won't fix". Here is the comment from the upstream tracker:
It's a pity, but I'm closing this. Alt+D for Datei seems to be usual mnemonic key for German translations; breaking it would be a not quite cool thing. And we cannot satisfy every language. You can use a workaround of adjusting keys.xml. The Debian report is at http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473246 -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org