I have Vanillla 2.1b2 and i use the default thème of Vanilla.
But when i try to have this style
(This is the style of official vanilla forum)
My discussions appear like this:
(Yes, I'm french and my forum too)
try this and see if it helps
I may not provide the completed solution you might desire, but I do try to provide honest suggestions to help you solve your issue.
Y a pas de quoi
In dashboard, I have selected "Modern layout" for discussions.
It works! Thanks!