Blown Index? Corrupted Table?

I've been getting this on and off in my vaccums.  Once it happens, the only way to
make it go away seems to be a dump/restore.  Is this bad, Bad, or BAD?

NOTICE:  Index idx_rawbebugs_assignedto: Pages 112; Tuples 31161: Deleted 0. CPU 0.01s/0.10u sec.
NOTICE:  Rel rawbebugs: Pages: 4435 --> 4400; Tuple(s) moved: 0. CPU 0.04s/0.01u sec.
NOTICE:  FlushRelationBuffers(rawbebugs, 4400): block 287 is referenced (private 0, global 1)
FATAL 1:  VACUUM (vc_repair_frag): FlushRelationBuffers returned -2

--
Adam Haberlach            | A billion hours ago, human life appeared on
adam@newsnipple.com       | earth.  A billion minutes ago, Christianity
http://www.newsnipple.com | emerged.  A billion Coca-Colas ago was
'88 EX500                 | yesterday morning. -1996 Coca-Cola Ann. Rpt.