Do you experience problems during downloading?
Check your connection in Status and Interface settings window.
Use Test Server in Config > Servers.
We will probably ask you to do a test using only basic settings.
Do you experience problems during repair or unpacking?
Enable +Debug logging in the Status and Interface settings window and share the relevant parts of the log here using [ code ] sections.
No, I'm not, but now that you mention IP blocks, I am tunneling through a WiTopia OpenVPN connection. Maybe that's enough to throw up some red flags at Newzbin?