Happy new year Steven and to all juicebox users,
Thank you for the quick reply, and the solution with transparent background for my first problem.
But the problem with the expanded background still exists.
I had already set the expanded background colour as you described it:
"And one for the expanded mode, #22222 (Very dark) (Colour, expanded background colour)"
Snapshot:
In the 'get embed code' I can't find something like 'expanded background colour ...' to change it manualy.
I use sw version 1.4.4.2.
Regards
Stephan
Update: I don't know why, but now it works with IE and Firefox. Chrome doesn't work at the moment, I deleted all browser data.