I had a look at the low rep and anonymous feedback here (might require some privileges):
It seems that questions with a high number of views (probably by users not familiar with StackExchange's ways) get high amounts of negative feedback. And this tendency is new, I never noticed it before.
A few examples:
Quelle formule de politesse doit-on utiliser à la fin des documents ? — Which valedictions can be used to end a letter?
(21k views, feedback: +7/-25)
Jusqu'alors ou jusqu'à lors ?
(8k views, feedback +6/-25)
I cannot find a good reason for this, except a problem with understanding the user interface by users who just pass by. I guess some might not understand the purpose of arrows (which are now used to obtain feedback from anonymous users). Another guess: maybe they fail to understand that the first post is actually the question, not an answer to the title?
Any other explanation? Are those questions really bad questions?
Follow-up questions: How come these questions don't show up first in the overrated list (specifically the third one)? Why do the figures found here (respectively +14, +9 and +11), which are described as “unique anonymous and low rep positive feedback”, not match with the previous figures?