If I click on the "sign package" checkbox in the project settings,
I'm prompted for the password of the keystore, but the "alias" combobox is not filled afterwards.
However if I do the same with system language set to English, it works.
(It also works if I add "export LANG=en_us_8859_1" to qtcreator.sh)

QTCreator seems to parse the output of "keytool" from JDK to get the alias names,
but the output of keytool in German says "Aliasname:" instead of "Alias name:"