when we show the quick access toolbar on changing the active page there is black line in the canvas of the window - on top of the tabs.
It seems that the caption height is different depending on quick access toolbar visibility. And if the quick access toolbar gets visible on page change the content is misaligned for this 2 pixels and instead a black line is shown (see screenshot blackline.png).
If you resize the window the black line disappears for the page with the quick access toolbar. And if you switch back to the page without the quick access toolbar, the content is overlapping the caption bar (see overlappingcaption.png).
Last edit: 9 years 1 month ago by Matthias Zangl. Reason: added more details