$asctime(z) was changed in 7.05 to take account of your DST offset so that the value it returns is your current offset from GMT (and so is applicable to the times that identifier returns).
If the output of $asctime(z) has changed then it is because you are in a part of the world that observes DST and advances its clocks during the summer months. As GMT remains the same all year round your offset from GMT will be different during this period.
Quote:
I'm confused really, it doesn't show what it used to how can that be right?