If you want open programs in command line, using kde file association, do it with kde-open.
If you want disable the ctrl-activated rectangles (access keys) in konqueror you must run this command:
kwriteconfig –file khtmlrc –group “Access Keys” –key Enabled –type bool false
if amarok in kde4, don’t play mp3, check in systemsettings->multimedia->backend, and view if you have xine backend selected. gstreamer backend have a bug.
If xine backend, don’t appear, install phonon-xine package (in mandriva urpmi phonon-xine).