If it happens that after installing VLconfig package of patches to update your VL and KDE you see after reboot that KDE kdm manager complains during startup/before login that it cannot find /opt/kde/share/apps/kd/theme/Glass Soho you can solve these issues in the following way
when you have such appearance that it complains that it cannot find theme in opt/kde/share/apps/kdm you can solve this problem by pressing firstly OK on that point and then log in normally.
When KDE is up, you have to go to Control Center and choose System Administration (at the bottom) and you will see tree of submenus opened. After that choose KDM Theme manager.
After that press Administrator mode enter your root password and chage theme to one which displays image on preview part on the right side of the screen, (for example GlassLights) press Apply and OK.
Voila! Reboot machine and it should be OK.