Comment 6 for bug 600388

I believe this is happening on my system as well. I can recreate the bug by doing the following:

1. Create a new file or folder, or modify an existing file or folder.
2. Navigate up one folder and the icon for the folder you were just in will not be present. The cursor shows the spinning pinwheel as well as the bottom right corner of Nautilus showing the red wheel and "Loading", which will continue indefinitely or until you refresh or navigate away and back to the folder.
3. After refresh or navigation, the child folder where the file/folder was created or modified no longer uses a CoverThumbnailer generated thumbnail and instead shows the default Nautilus folder icon.
4. Clearing thumbnail cache in the CoverThumbnailer GUI will make it regenerate all thumbnails so it fixes the ones that quit working after the bug occurs.

I'm running CoverThumbnailer v0.8.3 on Linux Mint 13 Cinnamon 64Bit, Kernel 3.2.0-23, GNOME 3.4.2, Nautilus 3.4.2.