Commenting out "StartupWMClass=opera" in /usr/share/applications/opera-browser.desktop did the trick. Had to log out and in and reattach opera to unity launcher, but now it works like it should again.
Commenting out "StartupWMClass =opera" in /usr/share/ applications/ opera-browser. desktop did the trick.
Had to log out and in and reattach opera to unity launcher, but now it works like it should again.