I have a similar problem. Every time I open both Opera 42.0.2393.94 Stable and Opera 44.0.2463.0 Dev, running Ubuntu 14.04.5 LTS (x86_64; Unity) This box below pops up 3 times in the upper left hand corner of my monitor!
Enter password to unlock your login keyring
I have to cancel it 3 times to get rid of it every time Opera is opened. How can you make this message stop from popping up all the time?