Context menus disappear

Bug: The right-click context menu flashes into existence and then immediately disappears.

Observed behavior: Using the touchpad, when right-clicking on OSX 10.10 the context menu is immediately destroyed upon creation. (For those who are not familiar, and in hopes this might help better isolate the problem, a right-click on an OSX touchpad requires first placing two fingers on the touchpad and then clicking the single button.) I haven't tested this with a mouse to see if behavior is identical.

This bug is seen with all Qt5.4.0 compiled applications, including Qt Creator 3.3.0-RC (downloaded as part of Qt5.4.0-RC). I haven't been able to test outside my laptop to see how pervasive the bug is.

Expected behavior: Context menu is destroyed only upon normal