gnome-screenshot "hangs" at taking a screenshot

[Nik]

I'm using the Unity desktop and since yesterday every time I take a screenshot with gnome-screenshot, it crashes while taking it. Means, the whole screen is white and doesn't fades out again. This problem is even there if I only shoot an area of the screen. The flash just stays at the area I've had marked before. But the save-dialog appers; although I can't use it. I've taken a screenshot of this problem using scrot, I attached it.

That's really annoying, I can only close it with Alt+F4 or Ctrl-C. Is this a known bug or am I doing something false? :D I also reinstalled gnome-screenshot, but this didn't change anything.

Thanks in advance!
---
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
CurrentDesktop: Unity
DistroRelease: Ubuntu 15.04
InstallationDate: Installed on 2015-06-11 (41 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
NonfreeKernelModules: nvidia
Package: gnome-screenshot 3.14.0-1ubuntu1
PackageArchitecture: amd64
Tags: third-party-packages vivid
Uname: Linux 4.1.0-040100-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm audio cdrom dialout dip lpadmin plugdev sambashare sudo wireshark
_MarkForUpload: True

[dino99 (9d9)]

hi Nik,

please provide the required details if you wish something being fixed

https://help.ubuntu.com/community/ReportingBugs

now run:
 apport-collect 1477552
http://manpages.ubuntu.com/manpages/vivid/man1/apport-collect.1.html

without these details that report is useless for the devs

[Nik (nikp)]

apport information

[Nik (nikp)]

apport information

[Nik (nikp)]

apport information

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.