Black artefacts during menu resize

I have uploaded a sculptmap from file.

Then i want to create a basic sculpty.

As soon as i switch to the basic selection box, the main menu box shrinks down,

because the file path apparently gets deleted and thus the input field is resized.

That leaves a black area to the right of the menu.

Although not a show stopper, it is disturbing and looks broken.

Probably related to this effect: Sometimes when selecting something, i get black boxes located "partially under" the menu box. These boxes also disappear when the menu closes again. I think this or something similar has already been reported by someone else...