The tvdb plugin 1.0.25 update is up with the workaround for season posters.
@Luke @Happy2Play 184.108.40.206 seems pretty sweet.
I checked a series I was having issues with (Specifically the one I attached above) and although the XML claims there are season posters, they do not display on their own site. In fact I tried to retrieve the entire series again it lost the series poster which was on their site!
I'm guessing they are still migrating media in to their collection or whatever. (I hope they haven't lost much in the change over process).
I'm just glad my media collection looks great again!
I love Emby and have been using it since it was called MediaBrowser, the Emby team has done a top notch job!
Anyway thanks and lets hope TVDB fix the last issues quickly