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.
Version: SABnzbd-0.5.6-win32
OS: Windows Vista SP1
Install-type: Windows Installer
Skin (if applicable): Default
Firewall Software: None
Are you using IPV6?: No
Is the issue reproducible?: This is not a issue at all