I've created a biweekly recurring event starting on 2013/12/01 (10-11:00) limited to three occurrences, then moved the second item to the next day and the third to the following week. The first and second item are shown correctly in the agenda but the third disappeared. In constrast, akonadiconsole lists all three events correctly. Furthermore, the "Date Navigator" indicates that events are happening on the original dates (2013/12/01, 2013/12/15, 2013/12/29) as well as the new ones (2013/12/16, 2014/01/05). Reproducible: Always I am using stock packages from openSUSE 13.1. Namely, korganizer version 4.11.2-1.1 and akonadi-runtime 1.10.3-4.1. Bug might be related to #325117.
Created attachment 84005 [details] Cut-down calendar file
Created attachment 84006 [details] Screenshot of the Date Navigator
Created attachment 84007 [details] Screenshot of akonadiconsole
Created attachment 84008 [details] Screenshot of agenda on 2014/01/05
I just checked whether the 'Month' view has the same bug. It doesn't. So the only affected components seem to be 'Agenda' view and 'Date Navigator'.
Created attachment 84009 [details] Screenshot of Month view
This bug has only been reported for versions before 4.14, which have been unsupported for at least two years now. Can anyone tell if this bug still present? If noone confirms this bug for a Framework-based version of korganizer (version 5.0 or later, as part of KDE Applications 15.08 or later), it gets closed in about three months.
Just as announced in my last comment, I close this bug. If you encounter it again in a recent version (at least 5.0 aka 15.08), please open a new one unless it already exists. Thank you for all your input.