I have lot photos (+ 40000), and I use F-Spot to manage it, but sometimes my thumbnails image are removed from ~/thumbnails/large

I have modified the cache thumbnail configuration with gconf-editor

/desktop/gnome/thumbnail_cache/maximum_age -1
/desktop/gnome/thumbnail_cache/maximum_size -1

But after time, my folder keep only 512MB of files (default config)

Why !! Is it a bug?

Serge