Not sure what all of this is about, when I wanted to remove some unused packages:

The following packages will be REMOVED:
  icedtea-netx{a} (D: openjdk-6-jre, D: openjdk-7-jre)  openjdk-7-jre{p}  openjdk-7-jre-headless{p}

Removing icedtea-netx:i386 (1.5.2-1.1) ...
update-alternatives: warning: forcing reinstallation of alternative /usr/lib/jvm/java-7-openjdk-i386/jre/bin/itweb-settings because link group itweb-settings is broken
update-alternatives: warning: not replacing /usr/share/man/man1/itweb-settings.1.gz with a link
Processing triggers for man-db (2.7.1-2) ...
(Reading database ... 166949 files and directories currently installed.)
Removing openjdk-7-jre:i386 (7u79-2.5.5-1) ...
Removing openjdk-7-jre-headless:i386 (7u79-2.5.5-1) ...