To solve this bug on the new release of Eclipse, most people use this solution. It works fine when I run Eclipse using terminal or from the default folder (/opt/eclipse/), but when I lock Eclipse to the launcher or create a .desktop file and open the file, it returns back to its default GTK.
My .desktop file is:
[Desktop Entry]
Version=Mars
Name=Eclipse
Exec=env UBUNTU_MENUPROXY= eclipse
Terminal=false
Icon=/opt/eclipse/icon.xpm
Type=Application
Categories=IDE;Development
Note: on "Exec" I have also tried /opt/eclipse/eclipse but that has not solved my problem.
Here's a video for more description.
