Ragnor: $5 on it being Slingshot shaping/traffic management/proxy issue....
Yes I'm sorry, but I don't quite follow what's going on here.
Is the OP a TelstraClear cable or dsl customer, or are they just moaning they're getting a problem and the content is hosted on servers feed to him via TelstraClear?
I'd like to see some traceroute prints to explain what the go is.
Ragnor that was my very next question, given that the problem happens later in the peace, is it a tracked connection management issue?
My routers can slow traffic based on counters on connections. So as the download gets bigger it slows down.