Task is not removed from queue

The ods-signerd crashed. Here is part of the dump:

• • • glibc detected *** /usr/local/sbin/ods-signerd: double free or corruption (fasttop): 0x0811fb48 ***
      ======= Backtrace: =========
      /lib/tls/i686/cmov/libc.so.6[0xb7b2ab25]
      /lib/tls/i686/cmov/libc.so.6(cfree+0x90)[0xb7b2e590]
      /usr/local/sbin/ods-signerd[0x805501b]
      /usr/local/sbin/ods-signerd[0x8052bcf]
      /usr/local/sbin/ods-signerd[0x8051076]
      /lib/tls/i686/cmov/libpthread.so.0[0xb7c134fb]
      /lib/tls/i686/cmov/libc.so.6(clone+0x5e)[0xb7b95f5e]
      ======= Memory map: ========
      08048000-08070000 r-xp 00000000 fe:02 215264 /usr/local/sbin/ods-signerd
      08070000-08071000 rw-p 00028000 fe:02 215264 /usr/local/sbin/ods-signerd
      08071000-08283000 rw-p 08071000 00:00 0 [heap]
      b2200000-b22d4000 rw-p b2200000 00:00 0
      b22d4000-b2300000 ---p b22d4000 00:00 0
      b2400000-b24f3000 rw-p b2400000 00:00 0
      b24f3000-b2500000 ---p b24f3000 00:00 0
      ...

And the last messages in syslog:

Aug 11 14:16:15 fou ods-auditor[16017]: Auditor started
Aug 11 14:16:16 fou ods-auditor[16017]: Auditor starting on mynta.org
Aug 11 14:16:16 fou ods-auditor[16017]: SOA differs : from 2009021403 to 2009021406
Aug 11 14:16:16 fou ods-auditor[16017]: Auditing mynta.org zone : NSEC3 SIGNED
Aug 11 14:16:17 fou ods-auditor[16017]: Finished auditing mynta.org zone
Aug 11 14:16:17 fou opendnssec: [STATS] mynta.org RR[count=0 time=0(sec)) NSEC3[count=0 time=0(sec)] RRSIG[new=1 reused=99 time=0(sec) avg=0(sig/sec)]
Aug 11 14:16:17 fou opendnssec: unable to schedule task sign for zone mynta.org: already present
Aug 11 14:16:17 fou opendnssec: unknown task[id 135367528 zone (null)], trying full sign
Aug 11 14:16:17 fou opendnssec: unable to schedule task read and sign for zone (null): already present