Alright, so my installation first stopped at
### package pluto-orbiter failed (tmp-tmp.NLvud11451)
So, I typed
apt-get install pluto-orbiter
Into the installer's console, and the installation continued. However, now it's stopped at
Setting up pluto-orbiter (1.0.2) ...
Can anyone help? :(
An install that stops with that error has no chance of ever working right... scrap it and start from scratch, then try to figure out why it stops.