It's possible CSS is being added by a plugin...try disabling those and see if the issue is still present...

Just did...
define('DISABLE_HOOKS', true);


Nope same situation. I will make some copy paste code from my forum to test forum and see.
I will inform with any luck if I have :)

Try this..

Goto adminCP > Maintenance > general update tools and "Remove Orphan Stylevars"

"Deleted Orphan Stylevars Successfully."
Did it twice, no change.


I will first try to Rebuild Styles and if no luck I will try the copy-paste code from one to other.
Thank you :)

OK
Are you saving CSS as files or in the database? Move them in database?

Thanks, I tried this but no change.


What I found:
In additional.css I have this.
---------------------------------------
.navbar a { color:{vb:stylevar navbar_link_color}; }
.navbar a:hover { color:{vb:stylevar navbar_linkhover_color}; }


If I change with this code:
---------------------------------
.navbar a { color: #000000; }
.navbar a:hover { color: #FFFFFF; }

Than I have the colors I want, except the vertical lines (I do not find yet)
Attachment 156811

If I change from stylevar the "navbar_link_color" it change both navbar and navbar_tab, see image.
Attachment 156812

* Problem with case, every change I make I must refresh many times to take effect in my browser. (but ok this)
* I do not know why when change in stylevar change both navbar and navtab?
* I am searching to find that vertical lines.

You should remove all the class belongs to navbar (.navbar , .navtab, . navtabs) in additional.css template.

Disable browser caching in .htaccess file for refresh issue.

Can you please be more specific :) my knowledge is not good.
Thanks for bothering to answer.

Post your additional.css here OR send it to me via email.

Here it is. Thank you.
Attachment 156813

Some thing strange, after update some changes made. luckily this is an update to a my dev site. I found the vertical lines, in additional.css if I delete this line it goes off
Strange strange :)