I can “fix” this by changing the “dialogs” icon size in system settings to 22, but all icons in regular windows are affected by this change.
Any ideas? Thanks!
I forgot to add that I’ve tried logging-in with a new user, and it was the same.
I also tried a neon kde livecd (I think it has plasma 5.7.5) and everything was ok.
openSUSE snapshot 20161006 upgraded kde plasma to version 5.8. All seems fine now.
For I can tell, there’s no option to mark the thread as solved; correct me if I’m mistaken.