Overfulls and underfulls

[Razican]

There are some overfulls and underfulls when compiling:

Before chapter 1 (it seems to be the front page):

Overfull \hbox (16.7856pt too wide) in paragraph at lines 24--25

In chapter 2 (it happens with the Go-Lab logo):

Underfull \vbox (badness 2856) has occurred while \output is active [4]

Update: Fixed.

In chapter 6:

Underfull \vbox (badness 10000) has occurred while \output is active [26]
Underfull \vbox (badness 4752) has occurred while \output is active [35])
Underfull \vbox (badness 6526) has occurred while \output is active [38]
Overfull \vbox (6.10905pt too high) has occurred while \output is active

Update: Fixed. Nevertheless, a new underfull has appeared after the ranking manual picture:

Underfull \vbox (badness 10000) has occurred while \output is active [33]

Update: A new underfull has appeared, in the Raspberry Pi logo:

Underfull \vbox (badness 3364) has occurred while \output is active [42]

Update 2: Fixed everything except from the front page, that is visually OK and probably won't be fixed.