Version: 4.2.2 (using 4.2.2 (KDE 4.2.2), Mandriva Linux release 2009.1 (Cooker) for i586) Compiler: gcc OS: Linux (i686) release 2.6.29.1-desktop586-4mnb The application doesnt crash. Im trying to mark a task or todo list as done, but every time i check on done and i mark apply or ok, the check mark disapears or unmarks it self. also if i us the 100% bar it also goes back to 0% when i click on apply or ok. It might help to say that i have the task with repetitions so that this task will happen every 3 months. If i do this with a task that will only be for one day (without repetitions) then the check mark works right, and the 100% list also works fine. its only with the tasks that have repetitions that i cannot check them as done.
That isn't a bug. When you uncheck it you'll see that the due that advances to the next occurrence. Imagine you have a monthly to-do to pay your rent. After you pay April's rent you check it. Now the next due date is in May.
Marking as invalid as this is the correct behavior. If a task has infinite occurrences then it can never be complete. You can see if a single occurrence is complete by looking in month view or agenda view.