Some distros also use modified Qt libraries which also sometimes causes strange problems. :/
Side note:
Since you wrote that you use Linux Mint, I'm surprised that you use KDE, since iirc Mint dropped the KDE support last year,... so it might be a problem with the combination of Mint&KDE,..
Side note:
Since you wrote that you use Linux Mint, I'm surprised that you use KDE, since iirc Mint dropped the KDE support last year,... so it might be a problem with the combination of Mint&KDE,..