Windows Vista Home Premium SP2. I set it to run a full scan at 1am (1:00) on 28/02/12 (or 02/28/12 if you're American) and went to bed, expecting it to run and shut down the PC. The following morning the PC was on Standby and the scan had not run.
So I set it to run in 5 minutes time, again with shutdown specified, with a view to letting it scan and shut down while I was out for the day. I checked it 10 minutes later and nothing had happened. No scan.
So I posted here to see if anyone else has the problem or just me. Apparently just me. :-(
Edit: Avast version 7.0.1407