Many (most?) titles on Stack Exchange are phrased as questions, rather than traditionally.
What Does X Mean?
Meaning of X
When I do this, I make sure to use Title Caps. It's still a title, after all - just phrased as a question.
Several times now - on other SE sites, as well - my questions have been edited to "fix" this. I usually just do a rollback, but I want to make sure it's okay.
Is there a site convention for title capitalization? Should there be?