Strange mail sent by BitarchiveServer

While running the test
dk.netarkivet.archive.bitarchive.distribute.IntegrityTests#testLotsOfMessages()
I get the following mail (and in 10 copies):
Subject: Netarkivet error: Request to move file 'Upload4.ARC' with checksum
'FFFF' to attic
Content:
udvikling.kb.dk
dk.netarkivet.archive.bitarchive.distribute.BitarchiveServer.visit(BitarchiveServer.java:299)
Request to move file 'Upload4.ARC' with checksum 'FFFF' to attic
NOTE: This bug is originally from Bugzilla bug_id=867.
This bug was previously assigned to Unassigned.