I have been a happy fan of Start 10 since it was released! I just upgraded to Start 11 today with version 2.05.
I use the old Windows 7 "Quick Launch" toolbar (I always loved this compact launcher), and I also show all icons in the system tray. I am using a left justified task bar at the bottom of the screen. I also use a double height taskbar.
Screen resolution is 1920 X 1080 (I have not tested it with a different resolution)
Windows Version:

The Problem:
I decided to try out the rounded taskbar feature (which is cool!).
Unfortunately, there appears to be a bug associated with the feature....
When I enable a "rounded taskbar" the search window displays a mirror of the icons in the quick launch toolbar.
This happens no matter which "rounded taskbar" option I select.
I played around with settings and it would come and go, but there was no setting that did not display this anomaly with rounded taskbar applied.

