in the event details the text for the labels
"txtRepeatCustomMonthLabel", "txtrepeatEnd",
"txtRepeatCustomMonthEvery" (and maybe some more) seem to be
automaticaly converted to lowercase. In the file "localization.js"
the values are spelled correctly (upper-/lowercase), but in the
gui they are displayed all lowercase. This maybe o.k. for most
(not all) english labels, but not for the other supported
languages (like german, there is "tagen" instead of "Tagen").