[CentOS] Amanda oddity (amcheck)

I'm slowly getting everything back to normal here after swapping 
motherboards on my server.  I also took the opportunity to bring the 
server up to CentOS 5.  I'm still getting services working but I have 
one oddity with amanda.  Ever since I upgraded the server to CentOS 5, 
amcheck dies and gives me a backtrace if there are no available tapes.  
amcheck works fine if the expected next tape is in my tape changer.  If 
it's time to change tapes, I get:

*** glibc detected *** /usr/sbin/amcheck: double free or corruption (fasttop): 0x09fb1a28 ***
======= Backtrace: =========
/lib/libc.so.6[0x9e1aa6]
/lib/libc.so.6(cfree+0x90)[0x9e4fc0]
/usr/sbin/amcheck[0x820e03]
/usr/sbin/amcheck(main+0xc2d)[0x82291d]
/lib/libc.so.6(__libc_start_main+0xdc)[0x990dec]
/usr/sbin/amcheck[0x81da01]
======= Memory map: ========
00110000-00135000 r-xp 00000000 09:02 2378087    /lib/libm-2.5.so
00135000-00136000 r-xp 00024000 09:02 2378087    /lib/libm-2.5.so
00136000-00137000 rwxp 00025000 09:02 2378087    /lib/libm-2.5.so
00137000-00140000 r-xp 00000000 09:02 2378088    /lib/libnss_files-2.5.so
00140000-00141000 r-xp 00008000 09:02 2378088    /lib/libnss_files-2.5.so
00141000-00142000 rwxp 00009000 09:02 2378088    /lib/libnss_files-2.5.so
002cd000-002d8000 r-xp 00000000 09:02 2378249    /lib/libgcc_s-4.1.2-20070626.so.1
002d8000-002d9000 rwxp 0000a000 09:02 2378249    /lib/libgcc_s-4.1.2-20070626.so.1
0046b000-0047a000 r-xp 00000000 09:02 2378128    /lib/libresolv-2.5.so
0047a000-0047b000 r-xp 0000e000 09:02 2378128    /lib/libresolv-2.5.so
0047b000-0047c000 rwxp 0000f000 09:02 2378128    /lib/libresolv-2.5.so
0047c000-0047e000 rwxp 0047c000 00:00 0 
006ab000-006be000 r-xp 00000000 09:02 2378125    /lib/libnsl-2.5.so
006be000-006bf000 r-xp 00012000 09:02 2378125    /lib/libnsl-2.5.so
006bf000-006c0000 rwxp 00013000 09:02 2378125    /lib/libnsl-2.5.so
006c0000-006c2000 rwxp 006c0000 00:00 0 
0081c000-00825000 r-xp 00000000 09:02 4560646    /usr/sbin/amcheck
00825000-00826000 rwxp 00008000 09:02 4560646    /usr/sbin/amcheck
008eb000-00904000 r-xp 00000000 09:02 2378079    /lib/ld-2.5.so
00904000-00905000 r-xp 00019000 09:02 2378079    /lib/ld-2.5.so
00905000-00906000 rwxp 0001a000 09:02 2378079    /lib/ld-2.5.so
0093a000-0093b000 r-xp 0093a000 00:00 0          [vdso]
0097b000-00ab5000 r-xp 00000000 09:02 2378081    /lib/libc-2.5.so
00ab5000-00ab7000 r-xp 0013a000 09:02 2378081    /lib/libc-2.5.so
00ab7000-00ab8000 rwxp 0013c000 09:02 2378081    /lib/libc-2.5.so
00ab8000-00abb000 rwxp 00ab8000 00:00 0 
00ae7000-00aea000 r-xp 00000000 09:02 2378258    /lib/libtermcap.so.2.0.8
00aea000-00aeb000 rwxp 00002000 09:02 2378258    /lib/libtermcap.so.2.0.8
00dfb000-00e1b000 r-xp 00000000 09:02 4953736    /usr/lib/libamserver-2.5.0p2.so
00e1b000-00e1d000 rwxp 0001f000 09:02 4953736    /usr/lib/libamserver-2.5.0p2.so
00e1d000-00e1f000 rwxp 00e1d000 00:00 0 
00ed0000-00eda000 r-xp 00000000 09:02 4674895    /usr/lib/libamtape-2.5.0p2.so
00eda000-00edb000 rwxp 00009000 09:02 4674895    /usr/lib/libamtape-2.5.0p2.so
00f9c000-00fbd000 r-xp 00000000 09:02 4675888    /usr/lib/libamanda-2.5.0p2.so
00fbd000-00fbe000 rwxp 00021000 09:02 4675888    /usr/lib/libamanda-2.5.0p2.so
00fbe000-00fdd000 rwxp 00fbe000 00:00 0 
09fab000-09fcc000 rw-p 09fab000 00:00 0 
b7e00000-b7e21000 rw-p b7e00000 00:00 0 
b7e21000-b7f00000 ---p b7e21000 00:00 0 
b7f86000-b7f89000 rw-p b7f86000 00:00 0 
b7f92000-b7f94000 rw-p b7f92000 00:00 0 
bfa86000-bfa9b000 rw-p bfa86000 00:00 0          [stack]
Amanda Tape Server Host Check
-----------------------------
Holding disk /share2/stage: 120193720 kB disk space available, using 120091320 kB


Nothing jumps out at me when I Google for the error.  Tape drive and 
changer are:

[root at fraud etc]# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 04 Lun: 00
  Vendor: HP       Model: C1557A           Rev: U709
  Type:   Sequential-Access                ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 04 Lun: 01
  Vendor: HP       Model: C1557A           Rev: U709
  Type:   Medium Changer                   ANSI SCSI revision: 02

Everything appears to work correctly otherwise (tape changer changes 
tapes, backups get done, etc.).  Just amcheck and only when the next 
tape isn't in the changer is a problem.

Cheers,
Dave

-- 
Politics, n. Strife of interests masquerading as a contest of principles.
-- Ambrose Bierce