Hi,
I am not even sure if this is a bug or not: when trying to create text in a box, the Frame Text Tool allows to convert a rectangular shape into a text frame (see pasted image). Once this has been done, its impossible to make any changes on the color of the rectangle ("the background"). It is however still possible to control other features such as the curvature of the edges.
I checked the Designer and its the same behaviour there, so I guess its intentionally like this?!? If there is a way to still manipulate the box but not the text, its not very intuitive (at least to me).
v. 1.7.0.58
Thanks for the great beta!