I am using remmina 1.2.0-rcgit.8 in Ubuntu. I have problems using "Scrolled fullscreen mode" for vnc. In fact it works identically as "Viewport fullscreen mode". In the past, the scrolled mode showed only a portion of screen and I was able to scroll. My friend is using older version 0.9.99.1 and he can use scrolled mode.
It is pretty annoying because I connect to a screen with 2048x2048 resolution which is much bigger than my and I get resized screen where I cannot see all the details. In "Scrolled fullscreen mode" I was able to see the details I needed and that does not work any more.
Sorry for this one. It was my fault because I mixed up scrolled mode and scaled mode. I can achieve what I want with scaled mode. False alarm.