Thanks for all your help and patience. Should I remove the plugin that has a problem?

[root@Debian: /]apt-get remove qtstalker
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run `apt-get -f install' to correct these:
The following packages have unmet dependencies:
qtstalker-quote-plugins: Depends: libqtstalker0 (>= 0.36) but it is not installable
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
[root@Debian: /]apt-get remove qtstalker-doc
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run `apt-get -f install' to correct these:
The following packages have unmet dependencies:
qtstalker: Depends: libqtstalker0 (>= 0.36) but it is not installable
Recommends: qtstalker-doc (= 0.36-1) but it is not going to be installed
qtstalker-quote-plugins: Depends: libqtstalker0 (>= 0.36) but it is not installable
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
[root@Debian: /]