I am finding the same, or very similar. This is the result of "aptitude upgrade" or (subsequently) "aptitude install exim4-config":
E: Sub-process /usr/bin/dpkg returned an error code (1) A package failed to install. Trying to recover: Setting up exim4-config (4.67-3) ... 2007-06-19 11:12:16 Exim configuration error in line 28 of /var/lib/exim4/config.autogenerated.tmp: malformed macro definition Invalid new configfile /var/lib/exim4/config.autogenerated.tmp not installing /var/lib/exim4/config.autogenerated.tmp to /var/lib/exim4/config.autogenerated dpkg: error processing exim4-config (--configure): subprocess post-installation script returned error exit status 1 dpkg: dependency problems prevent configuration of exim4-base: exim4-base depends on exim4-config (>= 4.30) | exim4-config-2; however: Package exim4-config is not configured yet. Package exim4-config-2 is not installed. Package exim4-config which provides exim4-config-2 is not configured yet. dpkg: error processing exim4-base (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of exim4-daemon-heavy: exim4-daemon-heavy depends on exim4-base (>= 4.67); however: Package exim4-base is not configured yet. dpkg: error processing exim4-daemon-heavy (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of eximon4: eximon4 depends on exim4-base (>= 4.10); however: Package exim4-base is not configured yet. dpkg: error processing eximon4 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of exim4: exim4 depends on exim4-base (>= 4.67); however: Package exim4-base is not configured yet. exim4 depends on exim4-daemon-light | exim4-daemon-heavy | exim4-daemon-custom; however: Package exim4-daemon-light is not installed. Package exim4-daemon-heavy is not configured yet. Package exim4-daemon-custom is not installed. dpkg: error processing exim4 (--configure): dependency problems - leaving unconfigured Errors were encountered while processing: exim4-config exim4-base exim4-daemon-heavy eximon4 exim4 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]