Invisible popup menus using cinnamon and muffin.

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https://bbs.archlinux.org – After a recent update of muffin-git*, popup (mostly right-click) menus in all applications have become invisible - if I click where I think the popup menu is supposed to be, a random action occurs (as I don't know which command is being clicked).  Firefox compact menu uses a popup so this does not display either.  Popup menus only work in Java applications (e.g., libre-office).Normal menu-bar drop-down menus are visible and work in all applications (qt, gtk and java).Does this sound like the problem is related to muffin, and I should be filing a bug against muffin?  Or has (HowTos)