Is anyone familiar with the conditions of Apple's warranty extension programs?

my iMac G5 is suffering from some power supply issues (it randomly just switches off), and the batch my iMac came from is covered by a warranty extension program, as the power supply is a known issue.

However, I've had it fixed under this program once before.

I had this same issue a year ago, and took it in, and they (as far as I know), replaced the whole power supply. Would it still be covered under the warranty extension? (It's obviously out of the normal warranty period).

Call the original service center and talk to them. It's a bit weird that a replacement unit under the program gave out.