Hi folks,
though i didn't change neither systemfonts nor GNOME-styles i've got wrong font of menus in following applications:

clementine
virtualbox
KeePassX

This is since Plasma 5.9. and system fonts changes do not apply to these apps for the moment.
Probably it's a matter of patience until they will be updated
But maybe there is something i could do beforehand, to get back my chosen font

I thought that is has got to do with Plasma 5.9. an qt integration or so.
Installed gtk2-engines-qtcurve and fiddled around with my fonts settings and transitorily the problem seemed solved- but it isn't
It returned and now got the wrong font also in 'nomachine' recently installed desktop remoter.

It seems that kde-style-qtcurve-qt5 can't be installed due to unresolved dependencies of qtbase-abi-5-5-1 (a bug?), maybe thats the problem??

I'm not sure where to go from here and I'd appreciate any idea.

Solution: its an qt4 integration problem.
Installed qt4-qtconfig and change font there- bingo

kinoe wrote:Solution: its an qt4 integration problem.
Installed qt4-qtconfig and change font there- bingo

I've don this here on fresh KDEneon 5.10. This does work but only to the next login, then you must change again and again and again. So not solved!

Is now fixed in KDE-Neon