Thanks for your answer.
It really was the combination with flip boxes.
When I disable the plugin, the logo has the right height again.
I tried to use css first, but using the following code did not help:
.navbar-default .navbar-brand {height:auto;}
neither did .navbar-brand {height:auto;}
Do I have another mistake in the code?
It would be nice if the flip box could be used also.
Thanks for your help.
