In the calendars week view, the whole day event row looks as if labeled as "Europe/". Instead, it should read something like "whole day", or "day", or "0-24" or "24h" or the like. Observed in version 4:4.5~20101001.1181693-1maemo4.1181469 and earlier.
Not there in windows-ce/Kontact-Mobile/testing/2011-01-17-02-23/