It seems like the video scanner in LMS isn't able to scan soft links exposed over samba where the samba server has been configured with unix_extensions=no so the soft links are exposed as standard files.

The reason for this kind of setup is that I'd like to expose a MythTV recording directory.

MythTV produces files like this as standard with no metadata inside the file:
2145_20110826150000.mpg

But you can run mythrename.pl script and it will then produce a directory with soft links named like:
V - 2011-08-26, 3-00 PM - Mother's Day.mpg
(which points to the above cryptical file name).

The scanner doesn't produce any errors in the log but when running it from the command line with debugging enabled I get things like this in the console:
stat error on file /mnt/video_smb/V - 2011-08-26, 3-00 PM - Mother's Day.mpg, errno=75
Skipping 0-byte file: /mnt/video_smb/V - 2011-08-26, 3-00 PM - Mother's Day.mpg
progress_update /mnt/video_smb/V - 2011-08-26, 3-00 PM - Mother's Day.mpg

Running ls -l on the same file gives this:
-rwxr-xr-x 1 root root 1183489516 2011-08-26 09:50 V - 2011-08-26, 3-00 PM - Mother's Day.mpg

Running stat on the same file gives this:
  File: `V - 2011-08-26, 3-00 PM - Mother\'s Day.mpg'
  Size: 1183489516	Blocks: 2313776    IO Block: 16384  regular file
Device: 17h/23d	Inode: 124770535386  Links: 1
Access: (0755/-rwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2011-09-25 18:55:02.000000000 -0400
Modify: 2011-08-26 09:50:00.000000000 -0400
Change: 2011-08-26 09:50:00.000000000 -0400

For me the severity is critical because LMS is useless for videos if this doesn't work but feel free to adjust the severity of this bug if you feel that it's not critical issue for the general public.