Comment 0 for bug 1690570

#BASIC SETUP
-server side: ext4 / lubuntu 14.04.5 / 4.4.0-72-generic #93~14.04.1-Ubuntu SMP .. i686 / samba 4.3.11
-client side: ext4 / lubuntu 14.04.5 / 4.4.0-75-generic #96~14.04.1-Ubuntu SMP x86_64 / mount.cifs 6.0
-both server and client are up-to-date
-mount line: mount.cifs //ip/share /mountpoint -o username=user,password=pass,uid=buntu,gid=buntu

#ANTERIOR WORKINGS PRIOR TO UPGRADES
-the server worked fine prior to upgrading
-the server had about 6 months prior to last upgrade (3 days ago)
-the client had about 1 month prior to last upgrade (3 days ago)

#THE PROBLEM
-the "CIFS VFS: src file seems to be from a different filesystem type" appears inside dmesg for every file copy/move to server
-the problem does not appear on connect with pcmanfm like smb://ip/share into the address bar
-the problem does not appear on create,move,copy files through the mount straight on server

#OTHER
-ive tested within virtualbox lubuntu 64 14.04.5 clean no upgrades apt-get install samba cifs-utils with the same problem
-the copied/moved files seem do be fine.. checksum tested

#EXPECTED RESULT
-no error messages(ive read about lost files)
-a clean workaround if possible(trough mount.cifs or samba options)