diff -Naur tumbler-0.1.5.org/plugins/ffmpeg-thumbnailer/ffmpeg-thumbnailer-provider.c tumbler-0.1.5/plugins/ffmpeg-thumbnailer/ffmpeg-thumbnailer-provider.c
--- tumbler-0.1.5.org/plugins/ffmpeg-thumbnailer/ffmpeg-thumbnailer-provider.c	2010-12-05 23:28:35.000000000 +0800
+++ tumbler-0.1.5/plugins/ffmpeg-thumbnailer/ffmpeg-thumbnailer-provider.c	2010-12-09 20:48:52.780180325 +0800
@@ -116,6 +116,7 @@
     "video/x-msvideo",
     "video/x-flv",
     "application/x-flash-video",
+    "application/vnd.rn-realmedia",
     "video/3gpp",
     "video/x-matroska",
     "video/ogg",