After I made sure that my software was up to date (I saw a notification to prompt me), my fonts are very small on all programs, even the panel shrank, but I corrected it. When trying to see my system settings, I get this message: "System Settings was unable to find any views, and hence has nothing to display." When I try to access system settings from the menu, I click on it, and nothing happens, I don't as much as see an error message.

I'm thinking that the last update I performed (this morning) had something to do with this.

Debian 8 Jessie on a 64-bit PC with 8 gigs of RAM, KDE desktop.

If you create a new (test) user and log in, does the problem persist?

Please post the output of:

Thanks Head_on_a_Stick,

After I created the new user for testing, I still get the same error when trying to access the system settings.
Here is the output of apt-cache policy:

Package files:
100 /var/lib/dpkg/status
release a=now
500 http://security.debian.org/ testing/updates/non-free Translation-en
500 http://security.debian.org/ testing/updates/main Translation-en
500 http://security.debian.org/ testing/updates/contrib Translation-en
500 http://security.debian.org/ testing/updates/non-free amd64 Packages
release o=Debian,a=testing,n=stretch,l=Debian-Security,c=non-free
origin security.debian.org
500 http://security.debian.org/ testing/updates/contrib amd64 Packages
release o=Debian,a=testing,n=stretch,l=Debian-Security,c=contrib
origin security.debian.org
500 http://security.debian.org/ testing/updates/main amd64 Packages
release o=Debian,a=testing,n=stretch,l=Debian-Security,c=main
origin security.debian.org
500 http://ftp.us.debian.org/debian/ testing/non-free Translation-en
500 http://ftp.us.debian.org/debian/ testing/main Translation-en
500 http://ftp.us.debian.org/debian/ testing/contrib Translation-en
500 http://ftp.us.debian.org/debian/ testing/non-free amd64 Packages
release o=Debian,a=testing,n=stretch,l=Debian,c=non-free
origin ftp.us.debian.org
500 http://ftp.us.debian.org/debian/ testing/contrib amd64 Packages
release o=Debian,a=testing,n=stretch,l=Debian,c=contrib
origin ftp.us.debian.org
500 http://ftp.us.debian.org/debian/ testing/main amd64 Packages
release o=Debian,a=testing,n=stretch,l=Debian,c=main
origin ftp.us.debian.org
500 http://ftp.us.debian.org/debian/ jessie-updates/main Translation-en
500 http://ftp.us.debian.org/debian/ jessie-updates/main amd64 Packages
release o=Debian,a=stable-updates,n=jessie-updates,l=Debian,c=main
origin ftp.us.debian.org
500 http://security.debian.org/ jessie/updates/main Translation-en
500 http://security.debian.org/ jessie/updates/main amd64 Packages
release v=8,o=Debian,a=stable,n=jessie,l=Debian-Security,c=main
origin security.debian.org
500 http://ftp.us.debian.org/debian/ jessie/main Translation-en
500 http://ftp.us.debian.org/debian/ jessie/main amd64 Packages
release v=8.1,o=Debian,a=stable,n=jessie,l=Debian,c=main
origin ftp.us.debian.org
500 cdrom://[Debian GNU/Linux 8 _Jessie_ - Official Snapshot amd64 LIVE/INSTALL Binary 20150425-14:07]/ jessie/main amd64 Packages
origin Debian GNU/Linux 8 _Jessie_ - Official Snapshot amd64 LIVE/INSTALL Binary 20150425-14:07
Pinned packages:

Your system looks a bit b0rked -- you have jessie *and* stretch in your sources

https://wiki.debian.org/DontBreakDeb..._FrankenDebian

It may be simplest to change your system to track Testing (ie, Debian stretch) alone and `apt-get dist-upgrade`

Thanks again,

I only updated per the notifications I saw. Any "Franken" add ons may have come from my plugins (Ice Tea, and/or gnash). I will move on to changing my system, and doing the dist-upgrade.

Enjoy your day.

-S

It was my own fault...

When Jessie advised more updates, I just blindly applied, and installed them all (too trusting). This is how I got the additional source. In the future, I will look closely at any update before I apply it; I may, or may not need it.

No, it isn't.

Blindly applying updates to a Debian Stable system should work without problems [1]; the reason you have problems with it is because *you* added extra repositories.

Post the content of /etc/apt/sources.list

[1] https://wiki.debian.org/UnattendedUpgrades

Yes, when I added java, and/or flash; nevertheless, all is working now. There are "too many cooks" when Linux tips are needed, resulting in outdated, or incorrect information.