You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
 libldap-2.4-2 : Breaks: libldap-2.4-2:i386 (!= 2.4.28-1.1ubuntu4.2) but 2.4.28-1.1ubuntu4.3 is installed
 libldap-2.4-2:i386 : Breaks: libldap-2.4-2 (!= 2.4.28-1.1ubuntu4.3) but 2.4.28-1.1ubuntu4.2 is installed
E: Unmet dependencies. Try using -f.

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When using -f:
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The following packages will be upgraded:
  libldap-2.4-2
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
2 not fully installed or removed.
Need to get 185 kB of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue [Y/n]?
Get:1 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main libldap-2.4-2 amd64 2.4.28-1.1ubuntu4.3 [185 kB]
Fetched 185 kB in 0s (1,038 kB/s)
dpkg: error processing libldap-2.4-2 (--configure):
 libldap-2.4-2:amd64 2.4.28-1.1ubuntu4.2 cannot be configured because libldap-2.4-2:i386 is in a different version (2.4.28-1.1ubuntu4.3)
dpkg: error processing libldap-2.4-2:i386 (--configure):
 libldap-2.4-2:i386 2.4.28-1.1ubuntu4.3 cannot be configured because libldap-2.4-2:amd64 is in a different version (2.4.28-1.1ubuntu4.2)
Errors were encountered while processing:
 libldap-2.4-2
 libldap-2.4-2:i386
E: Sub-process /usr/bin/dpkg returned an error code (1)