Here is a problem I mentioned in the Support area with beta 30664. I thought it had gone away with a subsequent release. If so, it's back.
The internal hard drive of my MacBook Pro (OS X 10.6) is partitioned into three volumes. Using avast! beta 1.0 (now, 35600b), I select 'Custom Scan' and choose the first volume for the scan. Avast completes the scan of the selected volume but continues on to scan the remaining, unselected partitions as though I had selected 'Full scan'. In the preferences, all three shields are checked. Also checked are 'Scan whole files' and 'Include warnings about files which cannot be scanned'. Neither of the Full System Scan boxes is checked.
The only way I've found to keep this from happening is to dismount the extraneous volumes before starting the scan.
Any thoughts?