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.
If I visit forum.sabnzbd.org I get to see an outdated version of the current frontpage.
The font is different and moreover it reports that 'Latest Version: 0.5.0 — Released: 21-FEB-2010'