High CPU usage (100%) by different applications 14.04 LTS

[VeVe]

Hi,

I've noticed that many applications randomly use 100% of the CPU cores for an indefinitely period of time.

For example...
* the Shotwell Viewer (without doing anything with it... just left a picture opened)
* the YELP application (isn't this just like a html viewer?)

Here is an image of the curious process > http://s4.postimg.org/idmqgei71/Screenshot_from_2014_07_12_13_25_11.png

Additional info:

Description: Ubuntu 14.04 LTS
Release: 14.04

yelp:
  Instalat: 3.10.2-0ubuntu1
  Candidează: 3.10.2-0ubuntu1
  Tabela de versiuni:
 *** 3.10.2-0ubuntu1 0
        500 http://ro.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status

shotwell:
  Instalat: 0.18.0-0ubuntu4
  Candidează: 0.18.0-0ubuntu4
  Tabela de versiuni:
 *** 0.18.0-0ubuntu4 0
        500 http://ro.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status