I adjust the wrapper to 98%.
But this wont fix if the image is too big, like screenshot in 22" screen pasted in the forum.
the image will be shown all but its still look ugly when the design will not stretch with the image.
attached is the updated vbulletin style xml for adestynia.
the best solution to this is to install auto resize mods.
that mod is by far the best solution for big images. It is working with 3.8.x.