[pkscout]

Over the last week I have updated the backgrounds for a few artists on both Fanart.tv and the AudioDB, I am not seeing the new artwork in the slide show. 

Artwork has been approved at Fanart.tv
rebooted PI

anything else I can do?

A while back there was a significant problem with AS beating the crap out the APIs of the various services (especially audiodb).  To help combat that, I implemented a random, really long delay between checks for new information on a given artist.  And when I say really long, it's between 12 and 24 weeks.  The easiest way to override that is to go to your Kodi userdata/addon_data folder and find script.artistslideshow.  In there is the ArtistInformation folder.  If you've upgraded to 2.1.0, look for the artist's name (pre-2.1.0 it's a hash of the name, so it's much harder to find) in that folder.  There are separate cachetime.nfo files for each of the services.  If you delete one or all of those, AS will get an updated JSON file from the services and download the new images.

I understand that this choice means new images don't show up immediately (or even very quickly), but at the time I made this change we had just lost access to HTBackdrops because they couldn't afford the bandwidth costs, and I was VERY sensitive to being a good API citizen with the remaining two services.  I don't really want to provide cache time as a setting, because then everyone will just set it to the shortest period.  I am willing to look at a shorter time period (like maybe 3 - 6 weeks instead of 12 - 24) if there's a sense that the current strategy has removed AS from the top list of API users (at one point I think we were the number one API user on audiodb).

And just to renew my periodic call.  If everyone who used AS would donate to Fanart.tv and TheAudioDB, we could probably fund their bandwidth so that AS wouldn't need to cache so aggressively.  Just saying. 😉