Downstream report:
https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1335811

1) lsb_release -rd
Description:	Ubuntu 14.04 LTS
Release:	14.04

2)  apt-cache policy nautilus
nautilus:
  Installed: 1:3.10.1-0ubuntu9.1
  Candidate: 1:3.10.1-0ubuntu9.1
  Version table:
 *** 1:3.10.1-0ubuntu9.1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:3.10.1-0ubuntu8 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

apt-cache policy gnome-session-fallback
gnome-session-fallback:
  Installed: 1:3.8.0-1ubuntu12
  Candidate: 1:3.8.0-1ubuntu12
  Version table:
 *** 1:3.8.0-1ubuntu12 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/universe amd64 Packages
        100 /var/lib/dpkg/status
     1:3.8.0-1ubuntu11 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages

3) What is expected to happen is when one initiates a nfs4 mounted file transfer from Ubuntu 14.04 using a nautilus window, and then cancels the transfer via clicking the button with a red circle with a white x in the File Operations window,  then initiates the same transfer, it begins with minimal delay.

4) What happens instead is the new File Operations window opens but doesn't actually progress. As well, when one attempts to cancel this new File Operations window by clicking the cancel button, the button shows as if it is depressed, but doesn't actually cancel the transfer, and simply remains. Killing all the gvfs processes didn't recover the window, so it would appear to be a nautilus issue.

The only WORKAROUND would be to restart, as restarting nautilus doesn't smoothly recover, causes all the desktop icons to disappear, and will no longer come up when initiated by a terminal.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: nautilus 1:3.10.1-0ubuntu9.1
ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
Uname: Linux 3.13.0-30-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Jun 30 05:21:37 2014
GsettingsChanges: b'org.gnome.nautilus.list-view' b'default-column-order' b"['name', 'size', 'type', 'date_modified', 'date_accessed', 'owner', 'group', 'permissions', 'mime_type', 'where']"
InstallationDate: Installed on 2014-06-21 (8 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)