It has been observed with pinpoint that when starting pinpoint with "-f" (start fullscreen) then the surface is not fullscreen on startup. And that 2 subsequent attempts to fullscreen (4 presses on F11 and thus 5 calls to clutter_stage_set_fullscreen) are required to get correct fullscreen behaviour.

Without passing -f fullscreening using the keyboard works first time.

Modifying test-stage-sizing to call clutter_stage_set_fullscreen just after creating the stage does not show this problem.