2013-02-22, 21:34
The way it is at the moment, it would be easier to manually browse to the TVDB.com site, manually download the missing season posters via your web browser in one batch, and then propagate them to their intended locations, and then remove and re-add the entire TV show library. The errors presented in manual mode require more navigation / key presses than doing a mass download external to XBMC.