I've had my fair share of bad power supplies. Over the last 2-3 months my power has gone off for between 1-2 hours on average. It's really bad, I hope they improve because my comp was on most of the time. I have surge or power protection so no need to worry. But still, the continuing switching off of power is annoying.
Anyway enough about me, good luck on getting it fixed. Power suppliers can be evil.