QSettings can't parse UTF-8 ini files

When I try to parse an UTF-8 ini file, Unicode key's are not recognized.

Sample:
QSettings* config;
config=new QSettings("foo.ini",QSettings::IniFormat,this);
config->setIniCodec("UTF-8");
qCInfo(foo)<<config->allKeys();
qCInfo(foo)<<config->contains(QString("foo/Schlüssel"));

Output:
foo.foo: ("foo/Schlüssel")
foo.foo: false

Ini file:
[foo]
Schlüssel=ccccc

output of file foo.ini
foo.ini: UTF-8 Unicode text