1. Back to Main-Menu
If you click on Online-Game->Favourites->some Server and then click abort all is fine.
Now click on another Server and you see in the background that the UI moves back to the main-menu of the game.
2. Glitch in Online-Game menu
I can't reproduce it now, but I clicked on some Servers in my Favourites list and got the message that the Server isn't updated to the newest version.
Then I got a glitch:

3. Half-sided frame around buttons
This frame around the buttons in red (SM) or green (TM2) looks like a rendering bug. I don't think is is one but it looks a bit confusing.

At least I have to say that the new UI looks quite nice but isn't implemented completely.
E.g. in Canyon Solo-Mode the old UI is still shown.
Regards,
matrix142