2014-02-16, 20:57
Turns out this has nothing to do with any of that.
That specific situation is an error in the anime-list.xml where the Rinne no Lagrange Season 2 entry had a defaulttvdbseason of "1" instead of "2".
I've now corrected it, so if you clear your cache and refresh the season 2 folder, you should get the correct thumbs.
The choice between storing the tvdb id or the anidb id has no connection to the episode thumbnails (which are retrieved from thetvdb regardless).
That specific situation is an error in the anime-list.xml where the Rinne no Lagrange Season 2 entry had a defaulttvdbseason of "1" instead of "2".
I've now corrected it, so if you clear your cache and refresh the season 2 folder, you should get the correct thumbs.
The choice between storing the tvdb id or the anidb id has no connection to the episode thumbnails (which are retrieved from thetvdb regardless).