Just loaded the backports in my install of LM13.
One problem I have is that the icons in the system tray do not appear correctly. Sometimes thay are just grey boxes other times the icon for gnote is just a thin yellow line. I only have the two icons there - Update Manager and Gnote.
The other thing is a question - When I installed the backports I followed the instructions forom here http://blog.linuxmint.com/?p=2225
I just installed the level 1 updates. There were no level 2 updates. However there are three level 3 updates for network-manager-gnome, libnm-gtk0 and, lib-nm-gtk-common. My question is should I install these, or ignore them. If I iognore them how do I get the update manager to stop displaying the ! telling me there are updates?