The localized date format is not respected when selecting the time interval to view the calendar in and when creating a new appointment/todo. (E.g. in Germany it should be 13.12.2011, whereas in the US it might be 12.13.2011). Observed in version 4:4.5~20100912.1174548-1maemo1.1173569 .
SVN commit 1176085 by tilladam: Allow the date format to be adjusted to locale. If we want to force a certain format, we'll have to translate it. Postponing that. BUG: 251091 M +2 -1 korganizer-mobile.qml WebSVN link: http://websvn.kde.org/?view=rev&revision=1176085
In 4:4.5~20100917.1176264-1maemo1.1174921 I see a changed format in the main view with a folder selected (that view showing all these buttons "Day view", "Week view", "New Appointment" etc.). However, now the year is missing (today it shows "17.09."). Not necessarily bad, but also wasting a lot of space. In the New Appointment view, input fields remained unchanged ("09.17.2010"), reopening, although not specified in original report. Ask me to file separate bug if you like. locale is de_DE .
Should be fixed in r1202548. I'll update the German localization accordingly.