Sorry, forgot to fill in the version info. The key part is cyrus 2.1 uses libdb3 (>= 3.2.9-23), while 2.2 uses libdb4.2.
$ dpkg -s cyrus21-imapd Package: cyrus21-imapd Status: install ok installed Priority: extra Section: mail Installed-Size: 1588 Maintainer: Henrique de Moraes Holschuh <[EMAIL PROTECTED]> Architecture: i386 Version: 2.1.18-3 Provides: imap-server Depends: cyrus21-common (= 2.1.18-3), libc6 (>= 2.3.5-1), libdb3 (>= 3.2.9-23), libsasl2 (>= 2.1.19), libssl0.9.8 (>= 0.9.8a-1), libwrap0 $ apt-cache show cyrus-imapd-2.2 Package: cyrus-imapd-2.2 Priority: extra Section: mail Installed-Size: 1844 Maintainer: Debian Cyrus Team <[EMAIL PROTECTED]> Architecture: i386 Version: 2.2.13-3 Replaces: cyrus21-imapd, cyrus22-imapd Provides: imap-server, cyrus21-imapd, cyrus22-imapd Depends: cyrus-common-2.2 (= 2.2.13-3), libc6 (>= 2.3.6-6), libdb4.2, libsasl2 (>= 2.1.19.dfsg1), libssl0.9.8 (>= 0.9.8a-1), libwrap0 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]