nvidia drivers don't apply sync to vblank when second monitor is turned on

I have a desktop with monitor and TV connected to it. In order to prevent tearing when watching video on the TV, I enable sync to vblank and select the TV as the display to sync to in the nvidia setting dialog. However, the next time I turn on the TV the setting is not re-applied and there is tearing. Interestingly, the solution is simply to open and close the settings dialog without changing anything - it does remember these preferences, but they simply don't get applied when the TV is turned on unless the settings are opened and closed. This gets annoying... it should automatically apply the settings when the TV is turned on, just like it does the rest of the settings (e.g. twinview, geometry, etc.)

Kubuntu 13.10 with KDE 4.11.3, NVidia 9300 with 319-updates (319.60) drivers and TwinView.