ok Lee, I have a object as background instead of a background image. If I remove this object, The thumbnails are displayed. I'll try to use the save game system even if I think works better the autosave.
I prefer the autosave system too. Save system is a bit outdated but it's the easiest way for displaying savegame thumbnails & date (text). Also possible with autosave/quicksave system, but requires a lot of work.
