VNC screen sharing worked fine on 10.9.5 until this update.
I get now an errors as if no valid user can be found...
In the settings app, remote management, the VNC password length also seems to be reduced.
Quite a critical bug as we use VNC to connect to teacher's laptops from the PC controlling the classroom beamer in a university setting.
MacOS, OS X Mavericks (10.9), Version 7 Update 45