XF 2.2 Very strange problem in new standardstyle Modern


Well-known member
I introduced a new standard style on my forum, Modern.
Additionally there are two Modern Dark styles and e gray Modern style.

Modern, as new standard style has a very strange problem - bold fonts are not possible.
All other Modern styles do not have this problem.

I decided to make Modern2 out of Modern Grey Fore.
This style functioned with bold fonts.
But: after changing Header and navigation to the colors of Modern, Modern2 had the same problem as Modern, bold fonts not possible.

I do not understand this.