When editing files on a (Windows?) networked drive I get "could not be saved" errors

When I edit files that are stored locally, everything works fine, but when editing files that are stored on my networked home directory (at uni here), I get:

The document "<x>" could not be saved.

when I try to save a file. If I then close the program (XCode), I get this:

If I click duplicate, and then reopen the file, the changes I just made are all there. And as far as I can tell, no duplicate file is created. With TextEdit I get this:

I've lost the browser tab now, but I read something that was saying this will only happen for programs that use OSX's autosave feature or something? So far, I get the error message in XCode and TextEdit, but not TextWrangler.

The networked drive is at /Volumes/Student/Home/myUsername/, and I think it's a windows drive, but I'm not sure.

EDIT: As requested, df:

Filesystem                             512-blocks       Used   Available Capacity  iused      ifree %iused  Mounted on
/dev/disk0s2                           1951845952   92568016  1858765936     5% 11635000  232345742    5%   /
devfs                                         363        363           0   100%      629          0  100%   /dev
map -hosts                                      0          0           0   100%        0          0  100%   /net
map auto_home                                   0          0           0   100%        0          0  100%   /home
map -fstab                                      0          0           0   100%        0          0  100%   /Network/Servers
//[email protected]/student        285149176   74120992   211028184    26%        0 18446744073709551615    0%   /Volumes/student
//[email protected]/student/Home 17203089400 5130812464 12072276936    30%        0 18446744073709551615    0%   /Volumes/student/Home

, and diskutil list:

/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:                        EFI                         209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            999.3 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

Autosave is not working, you might not have sufficient permission on that volume. You should try rebuild the permissions or take the folder ownership using chown -R.

"… does not support permanent storage" means Versions is not working because the volume is not HFS+, it must be NTFS or FAT and you are using a protocol such as smb.

Apps who aren't using Version and Autosave have no problems. If you want to disable these look here.