After running Amanda's backup, I receive an email with a report about the
last backup.
The first section of that report is: "FAILURE AND STRANGE DUMP SUMMARY:"
and under this section I get the following message:

  FAILURE AND STRANGE DUMP SUMMARY:
     servername    /folder/to/backup lev 0 STRANGE

What does STRANGE means?
I checked the data that was backed up on the tape and was able to restore
it - should I ignore that message or what does Amanda tries to tell me?

Many thanks,
gil