strange problem with mx record for ahi.org

[Frank.C.Hui at ap.pnu.com]

Platform : Solaris 2.6,  Bind 8.2.2p5

I have a fairly unusual problem with the MX record for ahi.org.  Several times a
day, my nameserver cannot resolve the MX record for ahi.org.  However, I could
query the NS record for it.  The problem would go away after I restarted the
daemon.   I can see ahi.org maintain the same MX records.  Why am I only having
problems with just one MX record, and not the thousand others on the Internet?

Frank Hui
System Engineer
Pharmacia Corp