My thumbnails have stopped creating files in the correct folder. I have three sites (v2.7) and each both quit storing thumbs at 1998 files in the directory. The interesting thing is that I do have thumbnails for all the videos on the site.

According to the source code for a displayed page the thumbnails are located in the correct directory just like any thumbnail for a very old video. It is just that I cannot see any more than 1998 files in the directory.

So, for instance. Files numbers 1_ 2001, 2_2001, 3_2001, 2001 all work but I cannot find where they are stored. I do not have a remote thumbnail server set up. The permissions are 777. One server has made a subdirectory and the others did not.