Disappearing preferences


Has any one noticed a loss (or lack of saved) preferences?

I have noticed the folowing problems:
1) on a two monitor system, the arrangement and resolution of the monitors is reset with each launch.

2) Dragging apps into the dock (such as the terminal) is not retentive: reboots restore (most of) the dock to its original state. I say most of, because some apps remain in place. Bizarre.