Data saved to a fuseblk (Windows NTFS) file system is silently lost

Ubuntu Studio 11.04 (natty)
Document Viewer 2.32.0

I spent almost an hour filling out a PDF form from a fuseblk (Windows NTFS) file system. Saving back onto the fuseblk (Windows NTFS) file system seemed to work because no error was reported and Nautilus showed that the saved file was bigger than the blank file. But when I exited "Document Viewer" no error was reported and the size of the saved file reverted to the size of the blank file and all my data was lost.

Work Around:

I coped the PDF to ext4 (Unix) file system. I entered data into a form, saved the file, and exited "Document Viewer." The save worked. Opening the saved file shows the data I entered in the previous session.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: evince 2.32.0-0ubuntu12.1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
AuditLog:

Date: Wed Jun 22 15:33:38 2011
ExecutablePath: /usr/bin/evince
InstallationMedia: Ubuntu-Studio 10.04 LTS "Lucid Lynx" - Release i386 (20100427.1)
ProcCmdline_: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=13e1ea7c-e3fa-4a47-b983-49c446a80a1d ro quiet splash vt.handoff=7
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature_: Ubuntu 2.6.38-8.42-generic 2.6.38.2
SourcePackage: evince
UpgradeStatus: Upgraded to natty on 2011-04-29 (54 days ago)