I installed plasma 5.3 on my ubuntu machine and I am encountering a strange problem. Some application icons are just not displayed: this happens only with kde, while with other DE (unity, gnome and gnome fallback) icons are properly displayed.
Even with .desktop entries that were created by me, there is no icon shown.
As you can see, in the second image no icon is displayed for "Mail", even though on the desktop the launcher is properly displayed.
How could I solve this issue?
This is the .desktop file for "Mail"
#!/usr/bin/env xdg-open [Desktop Entry] Comment=Webapp for outlook.com Exec=qmlscene /Applications/Mail/Main.qml Icon=/home/carloalberto/Downloads/outlook_icon.png Name[en_US]=Mail Name=Mail Path=/Applications/Mail/ StartupNotify=true Terminal=false Type=Application
But anyways, this doesn't happen only with my custom .desktop entries, as you can see