sshfs: problem with rsync

[Pierre Frenkiel <pierre.frenkiel@gmail.com>]

hi,
I'm using sshfs to copy some files from my PC to Android devices.
With the cp  command, no problem, but trying with "rsync -av"
gives the error:

   rsync: rename "/gs2/mnt/sdcard/.file.txt.xK3ZiH" -> "file.txt": Operation not permitted (1)

I first thought that the cause of the error was that the filesystem used
by default by sshfs is ntfs. I then added the option -o subtype=ext4 
Now, the mounted file system is actually ext4, but I still have the same error.
Is there a workaround ?

best regards,
--
Pierre Frenkiel