I upgraded to RC1 today on my Dell XPS13 laptop, which has a 1080p screen and encountered a minor issue.
Windows 10's recommended default font scaling for this machine is 150% - anything lower is pretty difficult to read. This isn't an issue for other apps including GCS 15.09. However apparently 16.09 scales it's UI up quite a bit at 150% font scaling. Perhaps this is a side-effect of the new version of Qt? This is great except that in this context the minimum vertical size of the Vehicle Setup Wizard dialog forces it to extend beyond the bottom of the screen. This causes a problem where the Next / Cancel buttons are off-screen and not clickable.
The workaround is easy - temporarily reduce font scaling to 125%. But addressing the issue should be pretty simple as well. Probably just setting the minimum height of the dialog to a smaller value would work, allowing the dialog height to fit < 1080p@150% and triggering Qt to add a vertical scroll-bar to the contained wizard window.
See attached.