[xwiki-users] Avatar in livetables oversized after migrating to 4.4

Hi all, I've got a problem after having migrating to 4.4. I use a few livetables in different workspaces displaying their users ; it worked well until now. But the avatar are now oversized when displayed in livetables, ie. it looks that it's the photo in its actual size which is displayed... I precise that I tried to upload new avatars; I also verified that this happened in all my workspaces. I was previously in 4.2. Anybody can help? Thanks by advance, Nicolas