No, I run a script now and again to fetch all the finished map threads and check for updates and refresh the thumbs for that. I haven't done that since the move because generally I don't have as good a connection as I used to have pre move and I have been getting server errors and timeouts. If I get one of these part way through the script then it would likely hose the thumbs so for now I am leaving them. To be honest, in the last week or so I have had less outages than previously so maybe I should run it though and risk it.