It's OK (for now). The certificate for the Nokia repository has expired. It happens when people decide to use SSL "because it's cool" but don't have a clue about it works. 1. catoriseplus needs to know when you install something, so it asks dpkg to be notified so that it can do its thing. 2. sketch/png: don't know why that shows up. Probably postinstall of xarchiver is broken, meaning that dpkg thinks it failed to install ("configure" in dpkg-speak), so it tries again, and again, etc. Report to maintainer of xarchiver, or uninstall broken program (you have to be hard with sloppily written "packages" anyway).