It dropped from #12 to #40 while the age went from around 17 to 19min and votes went up from 6 to 8. That can't be right without flags.
It's now #31 with 13 points and 27min, might get back on. It was also #31 less than a minute ago with 11 points, but 2 quick votes didn't move it up. That seems odd. Maybe I don't understand how this works, I don't know.
EDIT: and now it jumped to #7, still with 13 points. There must be some delay before stories move around, but I really don't get it.
EDIT 2: #1 and Daring Fireball picked it up. I really don't get to complain anymore :D http://daringfireball.net/linked/2013/05/23/screen-size-shen...
EDIT: It's #10 now. The three directly above it are all older with at least 100 fewer upvotes. It's gotta be flags. Apparently flagging front page stories lowers their ranking a lot. Interesting, IMO.