Possible bug in `du`

[Chris van O]

I found strange results with du on a Mandrake Linux 10CE box, running kernel 
2.6 on an Athlon64 system. This happens on a filesystem mounted smbfs...
address@hidden ralph]$ ls -l ~/video1.mpg 
-rw-rw-r--  1 chris chris 1595396 Apr 24 23:06 /home/chris/video1.mpg
address@hidden ralph]$ du ~/video1.mpg 
1.6M    /home/chris/video1.mpg
address@hidden ralph]$ cp ~/video1.mpg  /mnt/ralph/data/
address@hidden ralph]$ ls -l /mnt/ralph/data/video1.mpg 
-rw-r-----  1 1000 suse 1595396 Apr 27 18:03 /mnt/ralph/data/video
address@hidden ralph]$ du  /mnt/ralph/data/video1.mpg 
1.0G    /mnt/ralph/data/video1.mpg 1.mpg