Version: (using KDE 3.5.9) Installed from: Ubuntu Packages OS: Linux Looking at week-view it looks a bit weird that old tasks that are colored red instead of green or some other color that is associated with ”done”. The little green tick in the corner isn't obvious enough imho.
The task is only red if its not completed (and past its due date). Can you check again? Is it recurring?
No feedback from the user. Reopen if you still see the problem in KDE4 and give more information please. I can't reproduce it here.