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.
2014-05-23 12:08:24,716::ERROR::[database:111] SQL Command Failed, see log
2014-05-23 12:08:24,716::DEBUG::[database:112] SQL: select count(*) from History WHERE name LIKE ?
2014-05-23 12:08:24,716::INFO::[database:113] Traceback:
Traceback (most recent call last):
File "/usr/share/sabnzbdplus/sabnzbd/database.py", line 104, in execute
self.c.execute(command, args)
OperationalError: disk I/O error
Hard to tell.
Either a problem with your system or a bug in the sqlite library.
Try removing history1.db from your user profile (In ~/.sabnzbd),
while SABnzbd isn't running. You'll use your history.