Version: (using KDE 4.2.4) OS: Linux Installed from: Slackware Packages Fresh install (Slackware 13.0 KDE 4.2.4 GUI login). One user wants passwordless login. Using the login-button, numlock is not activated, but pressing enter does activate it. Numlock is set "on" in the control-center. Changing to normal login with password makes numlock kick in using the login-button. The same goes for the alt+tab actions (window switching). It works when logged in with enter or when a passwordless login is not set. OK, it's not the worst bug, but it's for sure not a feature...
Can't reproduce using KDE SC 4.11 beta2. Please try recent release to see whether the problem still happens.