Version: (using KDE 4.1.3) Installed from: SuSE RPMs "single click to open" setting is ignored SS violates its own settings. No matter what mode is chosen -- single or double click to open -- user always has to double click to open module in SS. Please, follow the settings.
What K/QStyle are you using? .Here (KDE 4.1.3) , using both QtCurve or Oxygen, SystemSettings follows the "single or double" click setting. (Sometimes is needed to close and reopen SystemSettings to obtain the new behaviour, I suppose this is related to your double bug post (bug 175280, bug 175279)) :)
Plastique, no matter what I set (single/double) I have to double click. No, it is not related, SS follows changes immediately.
It works fine on trunk. I've checked with all styles too.