I tend to prefer sentence case, as that Meta Stackexchange post says. We should make that clear, by stating it here.
For these examples, the editor changing things to title case is a good contributor... I'll see if I can contact them on other questions / answers where they may be @ed.
Do we all agree those are titles?
If we do, what's the logic of Sentence Case for a title?
I'm not a native English speaker but I try follow the language rules.
It is funny to see people not using capital letters at the beginning of the sentence, not using Title Case for titles, etc...
Moreover, I don't understand what's the issue here.
I can see Olli ...
rb-j, that seems to be standard operating procedure for all Stack Exchange sites. See this answer for why you may not be able to edit a question:
There are a handful of conditions where we will stop accepting suggested edits:
A large number of suggested edits by you were rejected in the past week (at least 5 more than one-third of your accepted edits).