What value do you have for the gconf key /apps/epiphany/web/minimum_font_size (you can browse it with gconf-editor)? What value does it take if you unset the key from gconf-editor?
What value do you have for the gconf key /apps/epiphany/ web/minimum_ font_size (you can browse it with gconf-editor)? What value does it take if you unset the key from gconf-editor?