right-click on a file -> Properties -> crash :

thunar: symbol lookup error: /usr/lib/thunarx-2/thunar-media-tags-plugin.so: undefined symbol: exo_gtk_object_ref_sink

"seems" that the plugin has to be ported to new exo..

Thunar = Thunar 1.1.5
Thunar-media-tags-plugin = 0.1.2

On the system, both exo 0.3.x and exo 0.5.5 are installed (for user friendly transition to new API).

All 4.8 exo-dependent packages are built with exo 0.5.5