In my country the power supply is very reliable (although there are fears for chaos, because the power market will be 'liberalized' in the near future). I can't remember when we had a power cut for the last time.
The only problem in the installation in our student house. The 'earthing' fail safe switch sometimes switches off and we don't have a clue what's causing it. But then again the previous owners made a mess of the wiring in here. In the kitchen sink closet there actually were live wires with the insulation worn away :-o.
I don't use any type of surge protection or UPS. My parents had a fax machine blown out once when lighting hit the phone line (underground). Other than that no power problems whatsoever there either.
