Guide download time out by one hour?

[Mark]

Running IceTV Interactive client 2.0.0.20 on Windows Vista in Melbourne.

I have Interactive set up to download new guide data at 6pm each day, but it seems to be happening consistently at about 5.15pm (ie an hour earlier than I would have expected).  PC clock is correct, and recordings all occur on time.

Not a big deal really, since I am getting a daily update, but wondering if this is a bug, or if I am misunderstanding something about the way the software is supposed to work.

Mark