We have an HA pair of 5540's (8.3.1) doing the same. Around 3 every second.
May 29 15:16:30 slc5-asa5540-1 %ASA-4-411005: Interface GigabitEthernet0/2 experienced a hardware transmit hang. A software reset has been performed.
May 29 15:16:30 slc5-asa5540-1 %ASA-4-411005: Interface GigabitEthernet0/2 experienced a hardware transmit hang. A software reset has been performed.
May 29 15:16:31 slc5-asa5540-1 %ASA-4-411005: Interface GigabitEthernet0/2 experienced a hardware transmit hang. A software reset has been performed.
May 29 15:16:31 slc5-asa5540-1 %ASA-4-411005: Interface GigabitEthernet0/2 experienced a hardware transmit hang. A software reset has been performed.