I can't make the size of Opera's tabs or windows smaller to match the size of my Macbook Pro display. It's too long and impossible to reduce to the desired size as it was possible before.
I deleted the latest version and installed an older one that was working right, but when I closed the browser and opened it again, the latest version was re installed and the problem returns again. At least is there a way to prevent Opera from upgrading automatically or should I change to a different browser that works as user desires.

I have the same problem, synchronization was ok in all my devices, but now stopped from working in Opera Mini at my iPhone and iPad mini, There’s no way for sync my tabs in the computer to my phone, I have tried logging in and out sever times and the problem remains.

I found is not an Opera problem, but Network configuration.
I solved it changing the settings for IPv6 to: link-local only in my Mac.
Now everything works fine again.

Since I upgrade Opera I receive the same messages too. Nothing seems to fix the problem. It used to be the best browser, but now is a real torture to receive this error messages instead open the pages that you want. I receive the error trying to open Gmail, facebook, instagram and some others.

My bookmarks icons disappeared today too, I'm seeing that is not only me with the same problem, I hope you really fix this too, because is one of the main features on the browser and I don't want to return to Chrome, Firefox or Safari because of this Opera problem.
It's weird but icons are working normal on my Mac mini under the latest OS 10 updated system, but not in my MacBook under 10.7.5