I’ve noticed this once in version before 5.0.545 and today in this version. Web Shield was disabled so the connection was NOT terminated. Only File System Shield was active (along with Network Shield and Behavior Shield). The first action is “Move to Chest”. Got few samples from MDL, they were detected by File System Shield, but not moved to chest. They were blocked but nothing was later found in the chest.
avast! Free is the only security software used and i’m running Vista x64.