Vaadin 7.1.7 is in use and the base theme is Runo.
There are some additions and modifications for the theme to our use.
I am not so familiar with CSS and have not done that myself.
What names in CSS effect to ComboBox?
And what attribute could be defining the space or location?
didn’t have time to reply before you already found the issue. So, was it something in your customizations of the theme or something in the vaadin framework?