Version:           4.2.86 (KDE 4.2.86 (KDE 4.3 >= 20090514)) "release 126" (using 4.2.86 (KDE 4.2.86 (KDE 4.3 >= 20090514)) "release 126", KDE:KDE4:Factory:Desktop / openSUSE_11.0)
Compiler:          gcc
OS:                Linux (i686) release 2.6.25.20-0.4-default

When I login and try to use any program that needs Ctrl+W (bash/zsh,vim,xemacs) directly, or when running on remote Windows machine in krdc sessions, I can't do it until I explicitely stop KHotKeys with ServiceManager.  Xev shows that with KHotKeys running and Control_L pressed when key W is pressed instead of key press event following key notify event is generated:

KeymapNotify event, serial 34, synthetic NO, window 0x0,
    keys:  2   0   0   2   32  0   0   0   0   0   0   0   0   0   0   0   
           0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   

"Input actions" settings does not have active anything related to Ctrl+W.