Hi
I recently got a new laptop, did a clean install of Windows 11, and then installed Start11, and RoundedTB.
If I run Start11 first, and then RoundedTB, my taskbar refuses to remove the blank areas. RoundedTB does nothing.
If I then run RoundedTB first, and the Start11, my taskbar does get the blank areas removed, but gets an extra half height black border.

Also when this happens, and I maximize a window, it does not go all the way down to the taskbar, but stops above the taskbar. The black part is my browser (FireFox) maximized.

I run with the same set of apps on multiple PCs, and this is the only PC that does it.
It seems both Start11 and RoundedTB wants to have exclusive control over the taskbar.
I do not use the enhanced taskbar offered by Start11, and I have not touched a single setting in the taskbar menu of Start11.