legal hostnames in zone files

[Borgia Joe A Contr AFRL/IFOS]

Is it possible to have hostnames with underscores in the zone files? I'm
testing
8.2.3, and it seems to be having trouble loading zones with hostnames that
have underscores. When I take the underscores out, it seems to load okay.
But domain-wide, I have 287 systems with underscores in the hostname. It
would
suck to have to touch all these boxes and change them just to suit 8.2.3. 

Still...if I have to....<sigh>. It just seems like I'm missing something.

Feb  9 12:21:32 pinky named[11633]: Zone "UNITY.RL.AF.MIL" (file
/usr/local/domain/domain.unity): No de
fault TTL ($TTL <value>) set, using SOA minimum instead
Feb  9 12:21:32 pinky named[11633]: owner name "NOCTEST_180.UNITY.RL.AF.MIL"
IN (primary) is invalid - 
rejecting
Feb  9 12:21:32 pinky named[11633]: /usr/local/domain/domain.unity:226:
owner name error
Feb  9 12:21:32 pinky named[11633]: /usr/local/domain/domain.unity:226:
Database error near (A)
Feb  9 12:21:32 pinky named[11633]: owner name "NOCTEST_182.UNITY.RL.AF.MIL"
IN (primary) is invalid - 
rejecting
Feb  9 12:21:32 pinky named[11633]: /usr/local/domain/domain.unity:228:
owner name error
Feb  9 12:21:32 pinky named[11633]: /usr/local/domain/domain.unity:228:
Database error near (A)
Feb  9 12:21:32 pinky named[11633]: owner name "NOCTEST_183.UNITY.RL.AF.MIL"
IN (primary) is invalid - 
rejecting
Feb  9 12:21:32 pinky named[11633]: /usr/local/domain/domain.unity:230:
owner name error
Feb  9 12:21:32 pinky named[11633]: /usr/local/domain/domain.unity:230:
Database error near (A)
Feb  9 12:21:32 pinky named[11633]: owner name "SANDRA_LEE.UNITY.RL.AF.MIL"
IN (primary) is invalid - r
ejecting
Feb  9 12:21:32 pinky named[11633]: /usr/local/domain/domain.unity:253:
owner name error
Feb  9 12:21:32 pinky named[11633]: /usr/local/domain/domain.unity:253:
Database error near (A)
Feb  9 12:21:32 pinky named[11633]: master zone "UNITY.RL.AF.MIL" (IN)
rejected due to errors (serial 2
001020702