I recently noticed that handling of "Daylight Savings Time" (a.k.a. "Summer Time") did not work for any southern-hemisphere locations in KStars. I fixed it in HEAD and 3_1_BRANCH yesterday, a bit too late for 3.1.3, unfortunately (it will be in version M_PI if there is one ;) )

Anyway, the problem was a badly-nested if-block in the function TimeZoneRule::isDSTActive(QDateTime), which determines if the given date should be using DST. The offending code was:

  if ( StartMonth < RevertMonth ) 
    if ( month < StartMonth || month > RevertMonth ) return false;
  else 
    if ( month < StartMonth && month > RevertMonth ) return false;

which I changed to:

  if ( StartMonth < RevertMonth ) {
    if ( month < StartMonth || month > RevertMonth ) return false;
  } else {
    if ( month < StartMonth && month > RevertMonth ) return false;
  }

Whoops. Any programmer worth their salt would not have made such a mistake; here, take the salt back, I don't deserve it!

Anyway, moral of the story? Qt/KDE is so easy to use, that even mediocre programmers like me can still be successful at application programming, but for Pete's sake, keep me away from kdelibs! ;)

(BTW, the reason the above code broke southern hemisphere locations is that for them, DST starts in months like October (10) and ends the following year in months like April (4))