...yes, the toolbar is painted on top of the normal page in order to not occupy any additional space on the screen - and assuming taht it normally fits quite well into the statusbar region of a page.
This may override meaningful conntent (long messages in the status bar...).
We are not sure yet what we can do:
(.) if we assign a background to the "toolbar" then it looks quite ugly on normale pages
(.) if we reserve an extra region then this occupies space on the screen