This is the tracking bug for Aurora 33 update. You can check Aurora status at https://l10n.mozilla.org/shipping/dashboard?locale=ko Merge date is 2014-09-01.
http://hg.mozilla.org/releases/l10n/mozilla-aurora/ko/rev/22ca15df35c1 tb_aurora 33 translation. There are no strings to translate in Calendar :)
http://hg.mozilla.org/releases/l10n/mozilla-aurora/ko/rev/05970634ba6c fennec_aurora 33 traslation
I've changed " with \" in android_strings.dtd to fix error but it does not work. It reported as "Unparsed content". So I changed it with \u0022 and it passes now. http://hg.mozilla.org/releases/l10n/mozilla-aurora/ko/rev/41fdbda507bc
pushed http://hg.mozilla.org/releases/l10n/mozilla-aurora/ko/rev/fe7456bb3c9c for fx_aurora 33