Product and version FileMaker Server 220.127.116.118
OS and version Win2012 and Mac OS10.12
Browser and version iE 11.0.9600.18639 and Safari 10.1 (12603.1.30.0.34)
Hardware Dedicated PC server and a Mac Mini (mid 2011)
Creating a new style for a button bar, in a new database.
The bar itself has no lines.
Inactive segments have white line at the bottom.
the active segment has a black line at the bottom.
The idea is to have active segment 'underlined' by a black line.
This works fine when the database is accessed via FMpro.
However, when using WebD, the initial view (with the default segment active) works, but when you click on another segment to make it active, the black line does not show.
Other elements signed by the style to the active segment (e.g. bold text, different coloured background) do show.
I have tried this on two different databases, one hosted on a windows machine, one hosted on a mac, each time creating the button bar style from scratch and saving it to the theme.