Comment 1 for bug 1557844

Hi,
there should be no difference between Pinta Windows and Pinta Ubuntu version. If there is a difference, then the most likely you are using different versions of Pinta. See Help | About menu for version you are using in both systems.

On Ubuntu if you are using Pinta older then 1.6, then please upgrade using a PPA.
Basically what you need to do in Terminal:
sudo add-apt-repository ppa:pinta-maintainers/pinta-stable
sudo apt-get update
sudo apt-get install pinta

If more detailed help is required then please see: http://pinta-project.com/pintaproject/pinta/howto/installing-pinta

Please report back if you problem is solved. If not please write your Ubuntu version and Pinta version from Help | About menu.
Regards