Bug#528468: cyrus-imapd-2.2: segfault when logging in

[Frisco]

Package: cyrus-imapd-2.2
Version: 2.2.13-14+b3
Severity: important

When logging in (tested Icedove, Horde Webmail (imp) and cyradm), I get the following errors:

==> /var/log/syslog <==
May 13 07:49:49 linux kernel: [769824.816234] imapd[12252]: segfault at 2c ip b7a55fd3 sp bffe9e2c error 4 in 
libc-2.9.so[b79da000+15a000]

==> /var/log/mail.info <==
May 13 07:49:49 linux cyrus/master[30206]: process 12252 exited, signaled to death by 11

This happened immediatly after the last aptitude safe-upgrade, which included an upgrade for libc6.

Is there any kind of workaround until the bug is fixed?

Cheers
Frisco

-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (990, 'testing'), (300, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.29-1-686-bigmem (SMP w/1 CPU core)
Locale: LANG=de_DE at euro, LC_CTYPE=de_DE at euro (charmap=ISO-8859-15)
Shell: /bin/sh linked to /bin/bash

Versions of packages cyrus-imapd-2.2 depends on:
ii  cyrus-common-2.2      2.2.13-14+b3       Cyrus mail system (common files)
ii  libasn1-8-heimdal     1.2.dfsg.1-4       Heimdal Kerberos - ASN.1 library
ii  libc6                 2.9-4              GNU C Library: Shared libraries
ii  libcomerr2            1.41.3-1           common error description library
ii  libdb4.2              4.2.52+dfsg-5      Berkeley v4.2 Database Libraries [
ii  libgssapi2-heimdal    1.2.dfsg.1-4       Heimdal Kerberos - GSSAPI support 
ii  libkrb5-25-heimdal    1.2.dfsg.1-4       Heimdal Kerberos - libraries
ii  libroken18-heimdal    1.2.dfsg.1-4       Heimdal Kerberos - roken support l
ii  libsasl2-2            2.1.22.dfsg1-23+b1 Cyrus SASL - authentication abstra
ii  libssl0.9.8           0.9.8g-16          SSL shared libraries
ii  libwrap0              7.6.q-16           Wietse Venema's TCP wrappers libra

cyrus-imapd-2.2 recommends no packages.

cyrus-imapd-2.2 suggests no packages.

-- no debconf information