shouldn't have to... that usually just means *something* is open that is tying up apt.. most common case is app manager.. if you're installing someone with dpkg that could do it..

But.. obviously a reboot will clear any of the problems and would probably be faster than trying to figure it.
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I'm working really quickly on a "first program" tutorial that will just have two list boxes and an input box.. you can add items to the box on the left and move them to the box on the right with buttons.

This will show examples of how to connect functions to signals and what-not.. I don't do wiki's though.. I'll post it here. Someone else can take the OP and then my screenshots and stuff and make a wiki article.