Disable "vibrate" in lock screen When in lock-screen, I have to move the middle circle over the "lock" on right hand side. The device vibrates 3x during it - is it possible to disable all the vibrations?

(Using ICS)
No, this is not an option.

Actually this seems like a bug as this should be controlled by the option, Vibrate on Touch under Sound in the settings.  Either that, or the option Vibrate  on Touch should remain visible when setting the screen security option to Slide in the Security part of the settings.

You may want to report this as a bug to the Android team using the Android Issue Tracker.