xfce-clipman-plugin and xfce-mpc-plugin is missing exo as dependency...
xfce4-mpc-plugin: Depends: exo >= 0.3.107
The CPU Frequency Monitor, CPU Graph and battery monitor plugin is not working.
OK, there are two ways I can fix this...
1. Simply remove the exo from the slack-required file as it is part of the base install.
2. Add exo-0.6.0 to the repo ( I have it built and ready to go.)
If I don't here from anyone on why option #2 is a terrible idea, I'll go with that. At least that way a person and re-install exo if they were to have a problem with it.