Will this annoying behave will be fixed?

As pindos said, the latest security update is the same build!

Same here, running opera 45.0.2552.898 Stable, on Linux Mint 18.1 (x86; MATE).

What you are experiencing is not a feature but a side effect of a bug. Please check this thread
https://forums.opera.com/topic/20742/hot-pink-menu-tab-bar

Thank you jimunderscorep.

Hello,
Is there a way to change tabs color?

I really dislike the pink color I have in opera (45.0.2552.898 Stable), running in Linux Mint 18.1 (x86; MATE). I can't find a way to change it to a light grey.

http://motus-anima.com/Descargas/2017-07-16.png

Thanks in advance!