Version: (using Devel) OS: Linux Installed from: Compiled sources The todo list in calendar (in kde 4.1.x.. currently using 4.1.3) is sorting by date incorrectly. When date format is set to mm/dd/yy (via locale setting change to United States), it sorts based upon the MONTH, and not the entire expression. Leaving the settings at "yyyy/mm/dd" works fine, of course. But is broken for US time expression.
This is a problem with the the UK locale, too. I have a to-do which is due on 02/03/2009 (ie March 2nd 2009). This is sorted before another which is due on 03/11/2008 (ie November 3rd 2008).
I just committed a fix for this which will be in KDE 4.1.4 and KDE 4.2.0 *** This bug has been marked as a duplicate of bug 171999 ***