Roughly a week ago , System Settings > Updates showed that updates were available for Document Viewer and for Beru. I tried to update them, repeatedly, individually and together. The download would progress to 100% and the "installing" message would appear, but the apps would not disappear from the "updates" list, and would still be there after I checked for updates again.
Today I uninstalled Document Viewer and tried to reinstall it from the Ubuntu Store. I found it in the store, and pressed "Install". The progress bar quickly advances to 100%, but then the Store shows me a screen displaying
Download Error
Download or install failed. Please try again.
[ Close ]
The same is true for Beru.
I also tried installing Podbird, which I have not previously installed. The same error occurs.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: software-center (not installed)
Uname: Linux 3.4.0-4-flo armv7l
ApportVersion: 2.17-0ubuntu2
Architecture: armhf
Date: Tue Apr 28 19:15:48 2015
InstallationDate: Installed on 2015-04-13 (15 days ago)
InstallationMedia: Ubuntu Vivid Vervet (development branch) - armhf (20150413-020204)
SourcePackage: software-center
UpgradeStatus: No upgrade log present (probably fresh install)
The device is a Nexus 7.