Comment # 3 on bug 907541 from macias -

@Dominique,

# xdg-mime query default application/msword
libreoffice3.5-writer.desktop

I changed it as you wrote, and checked with Thunar as well as Firefox. It works
in both cases.

Since LO 4.3 is installed along with OS 13.2 it seems upgrader does not upgrade
mime types well (at least not 100% properly).