BUG: Upper case file extensions caused the 'no preview' icon to drop back to 'preview unavailable' rather than showing the type specific icon on systems that have case-sensitive filesystems. Also, mkdir() glitch and deduping of field data.


git-svn-id: http://svn.montala.net/svn/resourcespace@5172 c08608d7-6e46-0410-86ca-f2a6f1370df5