here's the list of packages, i had to downgrade from testing, in order to have caja working : gir1.2-gtk-3.0 gtk-update-icon-cache libgail-3-0 libgtk-3-0 libgtk-3-bin libgtk-3-common
debian sid amd64. it might help others who search Debian MATE bug reports and find no solutions/info/workarounds to get their machines functional again. thanks to the original poster for giving directions on working around it. d.
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