I has found a problem. It was in the "google calendar" extension https://addons.opera.com/ru/extensions/details/google-calendar/?display=en
Only deleting solve this trouble.

And now i noticed that this windows opens/closes when opera starting everytime (via opera.exe and launcher.exe)

lando242, on the somewhere pages i see this notification, and somewhere not.
sgunhouse, in russian this is translate like "untitled".

Hello!
I have a trouble. This http://www.screencourier.com/image/28ispsl6lrw1tduujt96iso5gj untitled window opens and closes periodically (about every 2 hours maybe). It little bit disturbing and i dont know what is it. Opera version 30.0.1835.59.